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Posted to users@cloudstack.apache.org by Andrei Mikhailovsky <an...@arhont.com> on 2016/05/12 10:37:04 UTC
KVM disk cache option has no effect
Hello
I've been trying to use cache = writeback option for my KVM hypervisor with ceph backend storage. However, when I am launching a vm that uses the disk offering with cache=writeback, the cache setting is still set to =none according to the ps aux command.The same applies to the root as well as additional data volumes.
I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu 14.04.
Could someone please advise on how enable writeback cache?
Cheers
Andrei
Re: KVM disk cache option has no effect
Posted by "(IMIS) Enzo Bettini" <en...@imisglobal.com>.
Here is the structure of disk_offering_view in 4.8.0
+-------------------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------------+---------------------+------+-----+---------+-------+
| id | bigint(20) unsigned | NO | | 0 | |
| uuid | varchar(40) | YES | | NULL | |
| name | varchar(255) | NO | | NULL | |
| display_text | varchar(4096) | YES | | NULL | |
| provisioning_type | varchar(32) | NO | | thin | |
| disk_size | bigint(20) unsigned | NO | | NULL | |
| min_iops | bigint(20) unsigned | YES | | NULL | |
| max_iops | bigint(20) unsigned | YES | | NULL | |
| created | datetime | YES | | NULL | |
| tags | varchar(4096) | YES | | NULL | |
| customized | tinyint(1) unsigned | NO | | 0 | |
| customized_iops | tinyint(1) unsigned | YES | | NULL | |
| removed | datetime | YES | | NULL | |
| use_local_storage | tinyint(1) unsigned | NO | | 0 | |
| system_use | tinyint(1) unsigned | NO | | 0 | |
| hv_ss_reserve | int(32) unsigned | YES | | NULL | |
| bytes_read_rate | bigint(20) | YES | | NULL | |
| bytes_write_rate | bigint(20) | YES | | NULL | |
| iops_read_rate | bigint(20) | YES | | NULL | |
| iops_write_rate | bigint(20) | YES | | NULL | |
| cache_mode | varchar(16) | YES | | none | |
| sort_key | int(32) | NO | | 0 | |
| type | varchar(32) | YES | | NULL | |
| display_offering | tinyint(1) | NO | | 1 | |
| domain_id | bigint(20) unsigned | YES | | 0 | |
| domain_uuid | varchar(40) | YES | | NULL | |
| domain_name | varchar(255) | YES | | NULL | |
| domain_path | varchar(255) | YES | | NULL | |
+-------------------+---------------------+------+-----+---------+-------+
On 29/08/2016 08:48, Yuriy Karpel wrote:
> No table disk_offerings_view in 4.7.1. There is a table disk_offering with
> this structure:
>
> MariaDB [cloud]> SHOW COLUMNS FROM disk_offering;
> +-------------------+---------------------+------+-----+---------+----------------+
> | Field | Type | Null | Key | Default | Extra
> |
> +-------------------+---------------------+------+-----+---------+----------------+
> | id | bigint(20) unsigned | NO | PRI | NULL |
> auto_increment |
> | domain_id | bigint(20) unsigned | YES | | NULL |
> |
> | name | varchar(255) | NO | | NULL |
> |
> | uuid | varchar(40) | YES | UNI | NULL |
> |
> | display_text | varchar(4096) | YES | | NULL |
> |
> | disk_size | bigint(20) unsigned | NO | | NULL |
> |
> | type | varchar(32) | YES | | NULL |
> |
> | tags | varchar(4096) | YES | | NULL |
> |
> | recreatable | tinyint(1) unsigned | NO | | 0 |
> |
> | use_local_storage | tinyint(1) unsigned | NO | | 0 |
> |
> | unique_name | varchar(32) | YES | UNI | NULL |
> |
> | system_use | tinyint(1) unsigned | NO | | 0 |
> |
> | customized | tinyint(1) unsigned | NO | | 0 |
> |
> | removed | datetime | YES | MUL | NULL |
> |
> | created | datetime | YES | | NULL |
> |
> | sort_key | int(32) | NO | | 0 |
> |
> | display_offering | tinyint(1) | NO | | 1 |
> |
> | customized_iops | tinyint(1) unsigned | YES | | NULL |
> |
> | min_iops | bigint(20) unsigned | YES | | NULL |
> |
> | max_iops | bigint(20) unsigned | YES | | NULL |
> |
> | bytes_read_rate | bigint(20) | YES | | NULL |
> |
> | bytes_write_rate | bigint(20) | YES | | NULL |
> |
> | iops_read_rate | bigint(20) | YES | | NULL |
> |
> | iops_write_rate | bigint(20) | YES | | NULL |
> |
> | state | char(40) | NO | | Active |
> |
> | hv_ss_reserve | int(32) unsigned | YES | | NULL |
> |
> | cache_mode | varchar(16) | YES | | none |
> |
> | provisioning_type | varchar(32) | NO | | thin |
> |
> +-------------------+---------------------+------+-----+---------+----------------+
> 28 rows in set (0.00 sec)
>
>
>
> | 151 | 4 | test_cache| a6c0b591-0ca7-4938-91f4-8ed961f490b6 | test_cache
> | 0 | Disk | NULL | 0 | 0 | NULL | 0 | 1 | NULL | 2016-08-25
> 06:35:07 | 0 |1 | NULL | NULL | NULL | NULL | NULL | NULL | NULL
> | Active | NULL |writeback | thin |
>
>
> Can you show the structure of the table disk_offerings_view?
>
>
> 2016-08-25 15:06 GMT+03:00 Andrija Panic <an...@gmail.com>:
>
>> Example (2 volumes on RBD,1 volume on NFS) - 4.5.1, Ubutnu 14.04
>>
>> <disk type='network' device='disk'>
>> <driver name='qemu' type='raw' cache='writeback'/>
>> <auth username='zzzzzzz'>
>> <secret type='ceph' uuid='19291129-4fd4-3c77-a2a5-64632ee5dda1'/>
>> </auth>
>> <source protocol='rbd'
>> name='cold-storage/d8e3ee4a-c238-4afe-81b2-e06a0e19655e'>
>> <host name=xxxxx' port='6789'/>
>> </source>
>> <target dev='vda' bus='virtio'/>
>> <iotune>
>> <read_bytes_sec>41943040</read_bytes_sec>
>> <write_bytes_sec>20971520</write_bytes_sec>
>> <read_iops_sec>100</read_iops_sec>
>> <write_iops_sec>100</write_iops_sec>
>> </iotune>
>> <alias name='virtio-disk0'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
>> function='0x0'/>
>> </disk>
>> <disk type='network' device='disk'>
>> <driver name='qemu' type='raw' cache='writeback'/>
>> <auth username='yyyy'>
>> <secret type='ceph' uuid='19291129-4fd4-3c77-a2a5-64632ee5dda1'/>
>> </auth>
>> <source protocol='rbd'
>> name='cold-storage/39a571d4-9b78-4a10-aa9e-8caa86dbb53a'>
>> <host name='yyyyy' port='6789'/>
>> </source>
>> <target dev='vdd' bus='virtio'/>
>> <iotune>
>> <read_bytes_sec>125829120</read_bytes_sec>
>> <write_bytes_sec>125829120</write_bytes_sec>
>> <read_iops_sec>1000</read_iops_sec>
>> <write_iops_sec>1000</write_iops_sec>
>> </iotune>
>> <alias name='virtio-disk3'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>> function='0x0'/>
>> </disk>
>> <disk type='file' device='disk'>
>> <driver name='qemu' type='qcow2' cache='writeback'/>
>> <source
>> file='/mnt/14d3778f-b635-3edb-b60e-d43333eb917c/39e0f94a-
>> 4454-47a2-b73e-2105f6838142'/>
>> <target dev='vde' bus='virtio'/>
>> <iotune>
>> <read_bytes_sec>125829120</read_bytes_sec>
>> <write_bytes_sec>125829120</write_bytes_sec>
>> <read_iops_sec>1000</read_iops_sec>
>> <write_iops_sec>1000</write_iops_sec>
>> </iotune>
>> <alias name='virtio-disk4'/>
>>
>> On 25 August 2016 at 14:02, Andrija Panic <an...@gmail.com> wrote:
>>
>>> Guys, I', on 4.5.1, Ubuntu 14.04, and when I edit this field in
>>> disk_offerings_view, it does work, and ps aux | grep qemu clearly shows
>>> cache=writeback
>>>
>>> so this might be broken later, and would be good to understand when
>>> exactly, since we plan upgrade soon to 4.8 release...
>>>
>>> cheers
>>>
>>> On 25 August 2016 at 11:09, Andrei Mikhailovsky
>> <andrei@arhont.com.invalid
>>>> wrote:
>>>> I've experimented by using virsh and virtual-manager gui app. The acs
>> gui
>>>> settings make no difference to the cache settings. I am surprised it has
>>>> not been working for ages and no one actually fixed it.
>>>>
>>>> Cheers
>>>>
>>>> ----- Original Message -----
>>>>> From: "(IMIS) Enzo Bettini" <en...@imisglobal.com>
>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>> Sent: Wednesday, 24 August, 2016 09:24:50
>>>>> Subject: Re: KVM disk cache option has no effect
>>>>> Hi Andrei,
>>>>>
>>>>> How did you get around this? Did you manually update the VM
>>>>> configuration using virsh edit?
>>>>>
>>>>> Regards,
>>>>> Enzo
>>>>>
>>>>> On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>>>>>> Not as far as I know (. The ticket status is closed
>>>>>>
>>>>>> Andrei
>>>>>>
>>>>>> ----- Original Message -----
>>>>>>> From: "Simon Weller" <sw...@ena.com>
>>>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>>>> Sent: Thursday, 12 May, 2016 14:38:35
>>>>>>> Subject: Re: KVM disk cache option has no effect
>>>>>>> All,
>>>>>>>
>>>>>>> Is there a current issue in Jira on this?
>>>>>>>
>>>>>>> - Si
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ________________________________________
>>>>>>> From: Yuriy Karpel <yu...@karpel.su>
>>>>>>> Sent: Thursday, May 12, 2016 7:07 AM
>>>>>>> To: users@cloudstack.apache.org
>>>>>>> Subject: Re: KVM disk cache option has no effect
>>>>>>>
>>>>>>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>>>>>>
>>>>>>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>>>>>>
>>>>>>>> Hi Shweta,
>>>>>>>>
>>>>>>>> thanks for your findings. I am very much surprised to see this was
>>>> not
>>>>>>>> discovered earlier, especially since this feature has been
>>>> implemented many
>>>>>>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>>>>>>> impression that people are testing and reporting on the new
>> features
>>>> before
>>>>>>>> they hit the release, which apparently is not the case, at least
>> for
>>>> some
>>>>>>>> new features. From what I can see this feature was completed about
>> a
>>>> year
>>>>>>>> ago.
>>>>>>>>
>>>>>>>> I've tried to reopen this issue, but i don't have the rights due to
>>>> the
>>>>>>>> Jira being in a temporary Lockdown mode.
>>>>>>>>
>>>>>>>> Could someone with the right access reopen this issue on the
>> grounds
>>>> that
>>>>>>>> it was reported (by at least two individuals) that this feature is
>>>> not
>>>>>>>> working.
>>>>>>>>
>>>>>>>> Many thanks
>>>>>>>>
>>>>>>>> Andrei
>>>>>>>>
>>>>>>>> ----- Original Message -----
>>>>>>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>>>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>>>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>>>>>>> Subject: RE: KVM disk cache option has no effect
>>>>>>>>> Hi Andrei,
>>>>>>>>>
>>>>>>>>> Few days back I was also doing some testing in this area and then
>> we
>>>>>>>> found out
>>>>>>>>> that cache field in disk offering is just a UI or API parameter.
>>>> But in
>>>>>>>> actual
>>>>>>>>> implementation of the API we are just neglecting this parameter .
>> So
>>>>>>>>> effectively these parameters in disk offering does nothing .
>>>>>>>>>
>>>>>>>>> Thanks
>>>>>>>>> Shweta
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>>>>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>>>>>>> To: users
>>>>>>>>> Subject: KVM disk cache option has no effect
>>>>>>>>>
>>>>>>>>> Hello
>>>>>>>>>
>>>>>>>>> I've been trying to use cache = writeback option for my KVM
>>>> hypervisor
>>>>>>>> with ceph
>>>>>>>>> backend storage. However, when I am launching a vm that uses the
>>>> disk
>>>>>>>> offering
>>>>>>>>> with cache=writeback, the cache setting is still set to =none
>>>> according
>>>>>>>> to the
>>>>>>>>> ps aux command.The same applies to the root as well as additional
>>>> data
>>>>>>>> volumes.
>>>>>>>>> I am using ACS 4.7.1, both management and hypervisor servers are
>>>> Ubuntu
>>>>>>>> 14.04.
>>>>>>>>> Could someone please advise on how enable writeback cache?
>>>>>>>>>
>>>>>>>>> Cheers
>>>>>>>>>
>>>>>>>>> Andrei
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> DISCLAIMER
>>>>>>>>> ==========
>>>>>>>>> This e-mail may contain privileged and confidential information
>>>> which is
>>>>>>>> the
>>>>>>>>> property of Accelerite, a Persistent Systems business. It is
>>>> intended
>>>>>>>> only for
>>>>>>>>> the use of the individual or entity to which it is addressed. If
>>>> you are
>>>>>>>> not
>>>>>>>>> the intended recipient, you are not authorized to read, retain,
>>>> copy,
>>>>>>>> print,
>>>>>>>>> distribute or use this message. If you have received this
>>>> communication
>>>>>>>> in
>>>>>>>>> error, please notify the sender and delete all copies of this
>>>> message.
>>>>>>>>> Accelerite, a Persistent Systems business does not accept any
>>>> liability
>>>>>>>> for
>>>>>>>>> virus infected mails.
>>>
>>>
>>> --
>>>
>>> Andrija Pani\u0107
>>>
>>
>>
>> --
>>
>> Andrija Pani\u0107
>>
Re: KVM disk cache option has no effect
Posted by Yuriy Karpel <yu...@karpel.su>.
No table disk_offerings_view in 4.7.1. There is a table disk_offering with
this structure:
MariaDB [cloud]> SHOW COLUMNS FROM disk_offering;
+-------------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra
|
+-------------------+---------------------+------+-----+---------+----------------+
| id | bigint(20) unsigned | NO | PRI | NULL |
auto_increment |
| domain_id | bigint(20) unsigned | YES | | NULL |
|
| name | varchar(255) | NO | | NULL |
|
| uuid | varchar(40) | YES | UNI | NULL |
|
| display_text | varchar(4096) | YES | | NULL |
|
| disk_size | bigint(20) unsigned | NO | | NULL |
|
| type | varchar(32) | YES | | NULL |
|
| tags | varchar(4096) | YES | | NULL |
|
| recreatable | tinyint(1) unsigned | NO | | 0 |
|
| use_local_storage | tinyint(1) unsigned | NO | | 0 |
|
| unique_name | varchar(32) | YES | UNI | NULL |
|
| system_use | tinyint(1) unsigned | NO | | 0 |
|
| customized | tinyint(1) unsigned | NO | | 0 |
|
| removed | datetime | YES | MUL | NULL |
|
| created | datetime | YES | | NULL |
|
| sort_key | int(32) | NO | | 0 |
|
| display_offering | tinyint(1) | NO | | 1 |
|
| customized_iops | tinyint(1) unsigned | YES | | NULL |
|
| min_iops | bigint(20) unsigned | YES | | NULL |
|
| max_iops | bigint(20) unsigned | YES | | NULL |
|
| bytes_read_rate | bigint(20) | YES | | NULL |
|
| bytes_write_rate | bigint(20) | YES | | NULL |
|
| iops_read_rate | bigint(20) | YES | | NULL |
|
| iops_write_rate | bigint(20) | YES | | NULL |
|
| state | char(40) | NO | | Active |
|
| hv_ss_reserve | int(32) unsigned | YES | | NULL |
|
| cache_mode | varchar(16) | YES | | none |
|
| provisioning_type | varchar(32) | NO | | thin |
|
+-------------------+---------------------+------+-----+---------+----------------+
28 rows in set (0.00 sec)
| 151 | 4 | test_cache| a6c0b591-0ca7-4938-91f4-8ed961f490b6 | test_cache
| 0 | Disk | NULL | 0 | 0 | NULL | 0 | 1 | NULL | 2016-08-25
06:35:07 | 0 |1 | NULL | NULL | NULL | NULL | NULL | NULL | NULL
| Active | NULL |writeback | thin |
Can you show the structure of the table disk_offerings_view?
2016-08-25 15:06 GMT+03:00 Andrija Panic <an...@gmail.com>:
> Example (2 volumes on RBD,1 volume on NFS) - 4.5.1, Ubutnu 14.04
>
> <disk type='network' device='disk'>
> <driver name='qemu' type='raw' cache='writeback'/>
> <auth username='zzzzzzz'>
> <secret type='ceph' uuid='19291129-4fd4-3c77-a2a5-64632ee5dda1'/>
> </auth>
> <source protocol='rbd'
> name='cold-storage/d8e3ee4a-c238-4afe-81b2-e06a0e19655e'>
> <host name=xxxxx' port='6789'/>
> </source>
> <target dev='vda' bus='virtio'/>
> <iotune>
> <read_bytes_sec>41943040</read_bytes_sec>
> <write_bytes_sec>20971520</write_bytes_sec>
> <read_iops_sec>100</read_iops_sec>
> <write_iops_sec>100</write_iops_sec>
> </iotune>
> <alias name='virtio-disk0'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> function='0x0'/>
> </disk>
> <disk type='network' device='disk'>
> <driver name='qemu' type='raw' cache='writeback'/>
> <auth username='yyyy'>
> <secret type='ceph' uuid='19291129-4fd4-3c77-a2a5-64632ee5dda1'/>
> </auth>
> <source protocol='rbd'
> name='cold-storage/39a571d4-9b78-4a10-aa9e-8caa86dbb53a'>
> <host name='yyyyy' port='6789'/>
> </source>
> <target dev='vdd' bus='virtio'/>
> <iotune>
> <read_bytes_sec>125829120</read_bytes_sec>
> <write_bytes_sec>125829120</write_bytes_sec>
> <read_iops_sec>1000</read_iops_sec>
> <write_iops_sec>1000</write_iops_sec>
> </iotune>
> <alias name='virtio-disk3'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> function='0x0'/>
> </disk>
> <disk type='file' device='disk'>
> <driver name='qemu' type='qcow2' cache='writeback'/>
> <source
> file='/mnt/14d3778f-b635-3edb-b60e-d43333eb917c/39e0f94a-
> 4454-47a2-b73e-2105f6838142'/>
> <target dev='vde' bus='virtio'/>
> <iotune>
> <read_bytes_sec>125829120</read_bytes_sec>
> <write_bytes_sec>125829120</write_bytes_sec>
> <read_iops_sec>1000</read_iops_sec>
> <write_iops_sec>1000</write_iops_sec>
> </iotune>
> <alias name='virtio-disk4'/>
>
> On 25 August 2016 at 14:02, Andrija Panic <an...@gmail.com> wrote:
>
> > Guys, I', on 4.5.1, Ubuntu 14.04, and when I edit this field in
> > disk_offerings_view, it does work, and ps aux | grep qemu clearly shows
> > cache=writeback
> >
> > so this might be broken later, and would be good to understand when
> > exactly, since we plan upgrade soon to 4.8 release...
> >
> > cheers
> >
> > On 25 August 2016 at 11:09, Andrei Mikhailovsky
> <andrei@arhont.com.invalid
> > > wrote:
> >
> >> I've experimented by using virsh and virtual-manager gui app. The acs
> gui
> >> settings make no difference to the cache settings. I am surprised it has
> >> not been working for ages and no one actually fixed it.
> >>
> >> Cheers
> >>
> >> ----- Original Message -----
> >> > From: "(IMIS) Enzo Bettini" <en...@imisglobal.com>
> >> > To: "users" <us...@cloudstack.apache.org>
> >> > Sent: Wednesday, 24 August, 2016 09:24:50
> >> > Subject: Re: KVM disk cache option has no effect
> >>
> >> > Hi Andrei,
> >> >
> >> > How did you get around this? Did you manually update the VM
> >> > configuration using virsh edit?
> >> >
> >> > Regards,
> >> > Enzo
> >> >
> >> > On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
> >> >> Not as far as I know (. The ticket status is closed
> >> >>
> >> >> Andrei
> >> >>
> >> >> ----- Original Message -----
> >> >>> From: "Simon Weller" <sw...@ena.com>
> >> >>> To: "users" <us...@cloudstack.apache.org>
> >> >>> Sent: Thursday, 12 May, 2016 14:38:35
> >> >>> Subject: Re: KVM disk cache option has no effect
> >> >>> All,
> >> >>>
> >> >>> Is there a current issue in Jira on this?
> >> >>>
> >> >>> - Si
> >> >>>
> >> >>>
> >> >>>
> >> >>>
> >> >>>
> >> >>> ________________________________________
> >> >>> From: Yuriy Karpel <yu...@karpel.su>
> >> >>> Sent: Thursday, May 12, 2016 7:07 AM
> >> >>> To: users@cloudstack.apache.org
> >> >>> Subject: Re: KVM disk cache option has no effect
> >> >>>
> >> >>> The same function does not work on centos + ceph. CloudStack 4.7.1
> >> >>>
> >> >>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
> >> >>>
> >> >>>> Hi Shweta,
> >> >>>>
> >> >>>> thanks for your findings. I am very much surprised to see this was
> >> not
> >> >>>> discovered earlier, especially since this feature has been
> >> implemented many
> >> >>>> versions back (back in version 4.4 or 4.5 i think). I was under the
> >> >>>> impression that people are testing and reporting on the new
> features
> >> before
> >> >>>> they hit the release, which apparently is not the case, at least
> for
> >> some
> >> >>>> new features. From what I can see this feature was completed about
> a
> >> year
> >> >>>> ago.
> >> >>>>
> >> >>>> I've tried to reopen this issue, but i don't have the rights due to
> >> the
> >> >>>> Jira being in a temporary Lockdown mode.
> >> >>>>
> >> >>>> Could someone with the right access reopen this issue on the
> grounds
> >> that
> >> >>>> it was reported (by at least two individuals) that this feature is
> >> not
> >> >>>> working.
> >> >>>>
> >> >>>> Many thanks
> >> >>>>
> >> >>>> Andrei
> >> >>>>
> >> >>>> ----- Original Message -----
> >> >>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
> >> >>>>> To: "users" <us...@cloudstack.apache.org>
> >> >>>>> Sent: Thursday, 12 May, 2016 12:02:59
> >> >>>>> Subject: RE: KVM disk cache option has no effect
> >> >>>>> Hi Andrei,
> >> >>>>>
> >> >>>>> Few days back I was also doing some testing in this area and then
> we
> >> >>>> found out
> >> >>>>> that cache field in disk offering is just a UI or API parameter.
> >> But in
> >> >>>> actual
> >> >>>>> implementation of the API we are just neglecting this parameter .
> So
> >> >>>>> effectively these parameters in disk offering does nothing .
> >> >>>>>
> >> >>>>> Thanks
> >> >>>>> Shweta
> >> >>>>>
> >> >>>>> -----Original Message-----
> >> >>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
> >> >>>>> Sent: Thursday, May 12, 2016 4:07 PM
> >> >>>>> To: users
> >> >>>>> Subject: KVM disk cache option has no effect
> >> >>>>>
> >> >>>>> Hello
> >> >>>>>
> >> >>>>> I've been trying to use cache = writeback option for my KVM
> >> hypervisor
> >> >>>> with ceph
> >> >>>>> backend storage. However, when I am launching a vm that uses the
> >> disk
> >> >>>> offering
> >> >>>>> with cache=writeback, the cache setting is still set to =none
> >> according
> >> >>>> to the
> >> >>>>> ps aux command.The same applies to the root as well as additional
> >> data
> >> >>>> volumes.
> >> >>>>> I am using ACS 4.7.1, both management and hypervisor servers are
> >> Ubuntu
> >> >>>> 14.04.
> >> >>>>>
> >> >>>>> Could someone please advise on how enable writeback cache?
> >> >>>>>
> >> >>>>> Cheers
> >> >>>>>
> >> >>>>> Andrei
> >> >>>>>
> >> >>>>>
> >> >>>>>
> >> >>>>>
> >> >>>>>
> >> >>>>> DISCLAIMER
> >> >>>>> ==========
> >> >>>>> This e-mail may contain privileged and confidential information
> >> which is
> >> >>>> the
> >> >>>>> property of Accelerite, a Persistent Systems business. It is
> >> intended
> >> >>>> only for
> >> >>>>> the use of the individual or entity to which it is addressed. If
> >> you are
> >> >>>> not
> >> >>>>> the intended recipient, you are not authorized to read, retain,
> >> copy,
> >> >>>> print,
> >> >>>>> distribute or use this message. If you have received this
> >> communication
> >> >>>> in
> >> >>>>> error, please notify the sender and delete all copies of this
> >> message.
> >> >>>>> Accelerite, a Persistent Systems business does not accept any
> >> liability
> >> >>>> for
> >> > >>>> virus infected mails.
> >>
> >
> >
> >
> > --
> >
> > Andrija Panić
> >
>
>
>
> --
>
> Andrija Panić
>
Re: KVM disk cache option has no effect
Posted by Andrija Panic <an...@gmail.com>.
Example (2 volumes on RBD,1 volume on NFS) - 4.5.1, Ubutnu 14.04
<disk type='network' device='disk'>
<driver name='qemu' type='raw' cache='writeback'/>
<auth username='zzzzzzz'>
<secret type='ceph' uuid='19291129-4fd4-3c77-a2a5-64632ee5dda1'/>
</auth>
<source protocol='rbd'
name='cold-storage/d8e3ee4a-c238-4afe-81b2-e06a0e19655e'>
<host name=xxxxx' port='6789'/>
</source>
<target dev='vda' bus='virtio'/>
<iotune>
<read_bytes_sec>41943040</read_bytes_sec>
<write_bytes_sec>20971520</write_bytes_sec>
<read_iops_sec>100</read_iops_sec>
<write_iops_sec>100</write_iops_sec>
</iotune>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</disk>
<disk type='network' device='disk'>
<driver name='qemu' type='raw' cache='writeback'/>
<auth username='yyyy'>
<secret type='ceph' uuid='19291129-4fd4-3c77-a2a5-64632ee5dda1'/>
</auth>
<source protocol='rbd'
name='cold-storage/39a571d4-9b78-4a10-aa9e-8caa86dbb53a'>
<host name='yyyyy' port='6789'/>
</source>
<target dev='vdd' bus='virtio'/>
<iotune>
<read_bytes_sec>125829120</read_bytes_sec>
<write_bytes_sec>125829120</write_bytes_sec>
<read_iops_sec>1000</read_iops_sec>
<write_iops_sec>1000</write_iops_sec>
</iotune>
<alias name='virtio-disk3'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='writeback'/>
<source
file='/mnt/14d3778f-b635-3edb-b60e-d43333eb917c/39e0f94a-4454-47a2-b73e-2105f6838142'/>
<target dev='vde' bus='virtio'/>
<iotune>
<read_bytes_sec>125829120</read_bytes_sec>
<write_bytes_sec>125829120</write_bytes_sec>
<read_iops_sec>1000</read_iops_sec>
<write_iops_sec>1000</write_iops_sec>
</iotune>
<alias name='virtio-disk4'/>
On 25 August 2016 at 14:02, Andrija Panic <an...@gmail.com> wrote:
> Guys, I', on 4.5.1, Ubuntu 14.04, and when I edit this field in
> disk_offerings_view, it does work, and ps aux | grep qemu clearly shows
> cache=writeback
>
> so this might be broken later, and would be good to understand when
> exactly, since we plan upgrade soon to 4.8 release...
>
> cheers
>
> On 25 August 2016 at 11:09, Andrei Mikhailovsky <andrei@arhont.com.invalid
> > wrote:
>
>> I've experimented by using virsh and virtual-manager gui app. The acs gui
>> settings make no difference to the cache settings. I am surprised it has
>> not been working for ages and no one actually fixed it.
>>
>> Cheers
>>
>> ----- Original Message -----
>> > From: "(IMIS) Enzo Bettini" <en...@imisglobal.com>
>> > To: "users" <us...@cloudstack.apache.org>
>> > Sent: Wednesday, 24 August, 2016 09:24:50
>> > Subject: Re: KVM disk cache option has no effect
>>
>> > Hi Andrei,
>> >
>> > How did you get around this? Did you manually update the VM
>> > configuration using virsh edit?
>> >
>> > Regards,
>> > Enzo
>> >
>> > On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>> >> Not as far as I know (. The ticket status is closed
>> >>
>> >> Andrei
>> >>
>> >> ----- Original Message -----
>> >>> From: "Simon Weller" <sw...@ena.com>
>> >>> To: "users" <us...@cloudstack.apache.org>
>> >>> Sent: Thursday, 12 May, 2016 14:38:35
>> >>> Subject: Re: KVM disk cache option has no effect
>> >>> All,
>> >>>
>> >>> Is there a current issue in Jira on this?
>> >>>
>> >>> - Si
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> ________________________________________
>> >>> From: Yuriy Karpel <yu...@karpel.su>
>> >>> Sent: Thursday, May 12, 2016 7:07 AM
>> >>> To: users@cloudstack.apache.org
>> >>> Subject: Re: KVM disk cache option has no effect
>> >>>
>> >>> The same function does not work on centos + ceph. CloudStack 4.7.1
>> >>>
>> >>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>> >>>
>> >>>> Hi Shweta,
>> >>>>
>> >>>> thanks for your findings. I am very much surprised to see this was
>> not
>> >>>> discovered earlier, especially since this feature has been
>> implemented many
>> >>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>> >>>> impression that people are testing and reporting on the new features
>> before
>> >>>> they hit the release, which apparently is not the case, at least for
>> some
>> >>>> new features. From what I can see this feature was completed about a
>> year
>> >>>> ago.
>> >>>>
>> >>>> I've tried to reopen this issue, but i don't have the rights due to
>> the
>> >>>> Jira being in a temporary Lockdown mode.
>> >>>>
>> >>>> Could someone with the right access reopen this issue on the grounds
>> that
>> >>>> it was reported (by at least two individuals) that this feature is
>> not
>> >>>> working.
>> >>>>
>> >>>> Many thanks
>> >>>>
>> >>>> Andrei
>> >>>>
>> >>>> ----- Original Message -----
>> >>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>> >>>>> To: "users" <us...@cloudstack.apache.org>
>> >>>>> Sent: Thursday, 12 May, 2016 12:02:59
>> >>>>> Subject: RE: KVM disk cache option has no effect
>> >>>>> Hi Andrei,
>> >>>>>
>> >>>>> Few days back I was also doing some testing in this area and then we
>> >>>> found out
>> >>>>> that cache field in disk offering is just a UI or API parameter.
>> But in
>> >>>> actual
>> >>>>> implementation of the API we are just neglecting this parameter . So
>> >>>>> effectively these parameters in disk offering does nothing .
>> >>>>>
>> >>>>> Thanks
>> >>>>> Shweta
>> >>>>>
>> >>>>> -----Original Message-----
>> >>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>> >>>>> Sent: Thursday, May 12, 2016 4:07 PM
>> >>>>> To: users
>> >>>>> Subject: KVM disk cache option has no effect
>> >>>>>
>> >>>>> Hello
>> >>>>>
>> >>>>> I've been trying to use cache = writeback option for my KVM
>> hypervisor
>> >>>> with ceph
>> >>>>> backend storage. However, when I am launching a vm that uses the
>> disk
>> >>>> offering
>> >>>>> with cache=writeback, the cache setting is still set to =none
>> according
>> >>>> to the
>> >>>>> ps aux command.The same applies to the root as well as additional
>> data
>> >>>> volumes.
>> >>>>> I am using ACS 4.7.1, both management and hypervisor servers are
>> Ubuntu
>> >>>> 14.04.
>> >>>>>
>> >>>>> Could someone please advise on how enable writeback cache?
>> >>>>>
>> >>>>> Cheers
>> >>>>>
>> >>>>> Andrei
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> DISCLAIMER
>> >>>>> ==========
>> >>>>> This e-mail may contain privileged and confidential information
>> which is
>> >>>> the
>> >>>>> property of Accelerite, a Persistent Systems business. It is
>> intended
>> >>>> only for
>> >>>>> the use of the individual or entity to which it is addressed. If
>> you are
>> >>>> not
>> >>>>> the intended recipient, you are not authorized to read, retain,
>> copy,
>> >>>> print,
>> >>>>> distribute or use this message. If you have received this
>> communication
>> >>>> in
>> >>>>> error, please notify the sender and delete all copies of this
>> message.
>> >>>>> Accelerite, a Persistent Systems business does not accept any
>> liability
>> >>>> for
>> > >>>> virus infected mails.
>>
>
>
>
> --
>
> Andrija Panić
>
--
Andrija Panić
Re: KVM disk cache option has no effect
Posted by Andrija Panic <an...@gmail.com>.
Guys, I', on 4.5.1, Ubuntu 14.04, and when I edit this field in
disk_offerings_view, it does work, and ps aux | grep qemu clearly shows
cache=writeback
so this might be broken later, and would be good to understand when
exactly, since we plan upgrade soon to 4.8 release...
cheers
On 25 August 2016 at 11:09, Andrei Mikhailovsky <an...@arhont.com.invalid>
wrote:
> I've experimented by using virsh and virtual-manager gui app. The acs gui
> settings make no difference to the cache settings. I am surprised it has
> not been working for ages and no one actually fixed it.
>
> Cheers
>
> ----- Original Message -----
> > From: "(IMIS) Enzo Bettini" <en...@imisglobal.com>
> > To: "users" <us...@cloudstack.apache.org>
> > Sent: Wednesday, 24 August, 2016 09:24:50
> > Subject: Re: KVM disk cache option has no effect
>
> > Hi Andrei,
> >
> > How did you get around this? Did you manually update the VM
> > configuration using virsh edit?
> >
> > Regards,
> > Enzo
> >
> > On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
> >> Not as far as I know (. The ticket status is closed
> >>
> >> Andrei
> >>
> >> ----- Original Message -----
> >>> From: "Simon Weller" <sw...@ena.com>
> >>> To: "users" <us...@cloudstack.apache.org>
> >>> Sent: Thursday, 12 May, 2016 14:38:35
> >>> Subject: Re: KVM disk cache option has no effect
> >>> All,
> >>>
> >>> Is there a current issue in Jira on this?
> >>>
> >>> - Si
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> ________________________________________
> >>> From: Yuriy Karpel <yu...@karpel.su>
> >>> Sent: Thursday, May 12, 2016 7:07 AM
> >>> To: users@cloudstack.apache.org
> >>> Subject: Re: KVM disk cache option has no effect
> >>>
> >>> The same function does not work on centos + ceph. CloudStack 4.7.1
> >>>
> >>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
> >>>
> >>>> Hi Shweta,
> >>>>
> >>>> thanks for your findings. I am very much surprised to see this was not
> >>>> discovered earlier, especially since this feature has been
> implemented many
> >>>> versions back (back in version 4.4 or 4.5 i think). I was under the
> >>>> impression that people are testing and reporting on the new features
> before
> >>>> they hit the release, which apparently is not the case, at least for
> some
> >>>> new features. From what I can see this feature was completed about a
> year
> >>>> ago.
> >>>>
> >>>> I've tried to reopen this issue, but i don't have the rights due to
> the
> >>>> Jira being in a temporary Lockdown mode.
> >>>>
> >>>> Could someone with the right access reopen this issue on the grounds
> that
> >>>> it was reported (by at least two individuals) that this feature is not
> >>>> working.
> >>>>
> >>>> Many thanks
> >>>>
> >>>> Andrei
> >>>>
> >>>> ----- Original Message -----
> >>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
> >>>>> To: "users" <us...@cloudstack.apache.org>
> >>>>> Sent: Thursday, 12 May, 2016 12:02:59
> >>>>> Subject: RE: KVM disk cache option has no effect
> >>>>> Hi Andrei,
> >>>>>
> >>>>> Few days back I was also doing some testing in this area and then we
> >>>> found out
> >>>>> that cache field in disk offering is just a UI or API parameter. But
> in
> >>>> actual
> >>>>> implementation of the API we are just neglecting this parameter . So
> >>>>> effectively these parameters in disk offering does nothing .
> >>>>>
> >>>>> Thanks
> >>>>> Shweta
> >>>>>
> >>>>> -----Original Message-----
> >>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
> >>>>> Sent: Thursday, May 12, 2016 4:07 PM
> >>>>> To: users
> >>>>> Subject: KVM disk cache option has no effect
> >>>>>
> >>>>> Hello
> >>>>>
> >>>>> I've been trying to use cache = writeback option for my KVM
> hypervisor
> >>>> with ceph
> >>>>> backend storage. However, when I am launching a vm that uses the disk
> >>>> offering
> >>>>> with cache=writeback, the cache setting is still set to =none
> according
> >>>> to the
> >>>>> ps aux command.The same applies to the root as well as additional
> data
> >>>> volumes.
> >>>>> I am using ACS 4.7.1, both management and hypervisor servers are
> Ubuntu
> >>>> 14.04.
> >>>>>
> >>>>> Could someone please advise on how enable writeback cache?
> >>>>>
> >>>>> Cheers
> >>>>>
> >>>>> Andrei
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> DISCLAIMER
> >>>>> ==========
> >>>>> This e-mail may contain privileged and confidential information
> which is
> >>>> the
> >>>>> property of Accelerite, a Persistent Systems business. It is intended
> >>>> only for
> >>>>> the use of the individual or entity to which it is addressed. If you
> are
> >>>> not
> >>>>> the intended recipient, you are not authorized to read, retain, copy,
> >>>> print,
> >>>>> distribute or use this message. If you have received this
> communication
> >>>> in
> >>>>> error, please notify the sender and delete all copies of this
> message.
> >>>>> Accelerite, a Persistent Systems business does not accept any
> liability
> >>>> for
> > >>>> virus infected mails.
>
--
Andrija Panić
Re: KVM disk cache option has no effect
Posted by Andrei Mikhailovsky <an...@arhont.com.INVALID>.
I've experimented by using virsh and virtual-manager gui app. The acs gui settings make no difference to the cache settings. I am surprised it has not been working for ages and no one actually fixed it.
Cheers
----- Original Message -----
> From: "(IMIS) Enzo Bettini" <en...@imisglobal.com>
> To: "users" <us...@cloudstack.apache.org>
> Sent: Wednesday, 24 August, 2016 09:24:50
> Subject: Re: KVM disk cache option has no effect
> Hi Andrei,
>
> How did you get around this? Did you manually update the VM
> configuration using virsh edit?
>
> Regards,
> Enzo
>
> On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>> Not as far as I know (. The ticket status is closed
>>
>> Andrei
>>
>> ----- Original Message -----
>>> From: "Simon Weller" <sw...@ena.com>
>>> To: "users" <us...@cloudstack.apache.org>
>>> Sent: Thursday, 12 May, 2016 14:38:35
>>> Subject: Re: KVM disk cache option has no effect
>>> All,
>>>
>>> Is there a current issue in Jira on this?
>>>
>>> - Si
>>>
>>>
>>>
>>>
>>>
>>> ________________________________________
>>> From: Yuriy Karpel <yu...@karpel.su>
>>> Sent: Thursday, May 12, 2016 7:07 AM
>>> To: users@cloudstack.apache.org
>>> Subject: Re: KVM disk cache option has no effect
>>>
>>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>>
>>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>>
>>>> Hi Shweta,
>>>>
>>>> thanks for your findings. I am very much surprised to see this was not
>>>> discovered earlier, especially since this feature has been implemented many
>>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>>> impression that people are testing and reporting on the new features before
>>>> they hit the release, which apparently is not the case, at least for some
>>>> new features. From what I can see this feature was completed about a year
>>>> ago.
>>>>
>>>> I've tried to reopen this issue, but i don't have the rights due to the
>>>> Jira being in a temporary Lockdown mode.
>>>>
>>>> Could someone with the right access reopen this issue on the grounds that
>>>> it was reported (by at least two individuals) that this feature is not
>>>> working.
>>>>
>>>> Many thanks
>>>>
>>>> Andrei
>>>>
>>>> ----- Original Message -----
>>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>>> Subject: RE: KVM disk cache option has no effect
>>>>> Hi Andrei,
>>>>>
>>>>> Few days back I was also doing some testing in this area and then we
>>>> found out
>>>>> that cache field in disk offering is just a UI or API parameter. But in
>>>> actual
>>>>> implementation of the API we are just neglecting this parameter . So
>>>>> effectively these parameters in disk offering does nothing .
>>>>>
>>>>> Thanks
>>>>> Shweta
>>>>>
>>>>> -----Original Message-----
>>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>>> To: users
>>>>> Subject: KVM disk cache option has no effect
>>>>>
>>>>> Hello
>>>>>
>>>>> I've been trying to use cache = writeback option for my KVM hypervisor
>>>> with ceph
>>>>> backend storage. However, when I am launching a vm that uses the disk
>>>> offering
>>>>> with cache=writeback, the cache setting is still set to =none according
>>>> to the
>>>>> ps aux command.The same applies to the root as well as additional data
>>>> volumes.
>>>>> I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
>>>> 14.04.
>>>>>
>>>>> Could someone please advise on how enable writeback cache?
>>>>>
>>>>> Cheers
>>>>>
>>>>> Andrei
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> DISCLAIMER
>>>>> ==========
>>>>> This e-mail may contain privileged and confidential information which is
>>>> the
>>>>> property of Accelerite, a Persistent Systems business. It is intended
>>>> only for
>>>>> the use of the individual or entity to which it is addressed. If you are
>>>> not
>>>>> the intended recipient, you are not authorized to read, retain, copy,
>>>> print,
>>>>> distribute or use this message. If you have received this communication
>>>> in
>>>>> error, please notify the sender and delete all copies of this message.
>>>>> Accelerite, a Persistent Systems business does not accept any liability
>>>> for
> >>>> virus infected mails.
Re: KVM disk cache option has no effect
Posted by Yuriy Karpel <yu...@karpel.su>.
Old closed bug.
https://issues.apache.org/jira/browse/CLOUDSTACK-1302
2016-08-24 11:24 GMT+03:00 (IMIS) Enzo Bettini <en...@imisglobal.com>:
> Hi Andrei,
>
> How did you get around this? Did you manually update the VM configuration
> using virsh edit?
>
> Regards,
> Enzo
>
>
> On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>
>> Not as far as I know (. The ticket status is closed
>>
>> Andrei
>>
>> ----- Original Message -----
>>
>>> From: "Simon Weller" <sw...@ena.com>
>>> To: "users" <us...@cloudstack.apache.org>
>>> Sent: Thursday, 12 May, 2016 14:38:35
>>> Subject: Re: KVM disk cache option has no effect
>>> All,
>>>
>>> Is there a current issue in Jira on this?
>>>
>>> - Si
>>>
>>>
>>>
>>>
>>>
>>> ________________________________________
>>> From: Yuriy Karpel <yu...@karpel.su>
>>> Sent: Thursday, May 12, 2016 7:07 AM
>>> To: users@cloudstack.apache.org
>>> Subject: Re: KVM disk cache option has no effect
>>>
>>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>>
>>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>>
>>> Hi Shweta,
>>>>
>>>> thanks for your findings. I am very much surprised to see this was not
>>>> discovered earlier, especially since this feature has been implemented
>>>> many
>>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>>> impression that people are testing and reporting on the new features
>>>> before
>>>> they hit the release, which apparently is not the case, at least for
>>>> some
>>>> new features. From what I can see this feature was completed about a
>>>> year
>>>> ago.
>>>>
>>>> I've tried to reopen this issue, but i don't have the rights due to the
>>>> Jira being in a temporary Lockdown mode.
>>>>
>>>> Could someone with the right access reopen this issue on the grounds
>>>> that
>>>> it was reported (by at least two individuals) that this feature is not
>>>> working.
>>>>
>>>> Many thanks
>>>>
>>>> Andrei
>>>>
>>>> ----- Original Message -----
>>>>
>>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>>> Subject: RE: KVM disk cache option has no effect
>>>>> Hi Andrei,
>>>>>
>>>>> Few days back I was also doing some testing in this area and then we
>>>>>
>>>> found out
>>>>
>>>>> that cache field in disk offering is just a UI or API parameter. But in
>>>>>
>>>> actual
>>>>
>>>>> implementation of the API we are just neglecting this parameter . So
>>>>> effectively these parameters in disk offering does nothing .
>>>>>
>>>>> Thanks
>>>>> Shweta
>>>>>
>>>>> -----Original Message-----
>>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>>> To: users
>>>>> Subject: KVM disk cache option has no effect
>>>>>
>>>>> Hello
>>>>>
>>>>> I've been trying to use cache = writeback option for my KVM hypervisor
>>>>>
>>>> with ceph
>>>>
>>>>> backend storage. However, when I am launching a vm that uses the disk
>>>>>
>>>> offering
>>>>
>>>>> with cache=writeback, the cache setting is still set to =none according
>>>>>
>>>> to the
>>>>
>>>>> ps aux command.The same applies to the root as well as additional data
>>>>>
>>>> volumes.
>>>>
>>>>> I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
>>>>>
>>>> 14.04.
>>>>
>>>>>
>>>>> Could someone please advise on how enable writeback cache?
>>>>>
>>>>> Cheers
>>>>>
>>>>> Andrei
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> DISCLAIMER
>>>>> ==========
>>>>> This e-mail may contain privileged and confidential information which
>>>>> is
>>>>>
>>>> the
>>>>
>>>>> property of Accelerite, a Persistent Systems business. It is intended
>>>>>
>>>> only for
>>>>
>>>>> the use of the individual or entity to which it is addressed. If you
>>>>> are
>>>>>
>>>> not
>>>>
>>>>> the intended recipient, you are not authorized to read, retain, copy,
>>>>>
>>>> print,
>>>>
>>>>> distribute or use this message. If you have received this communication
>>>>>
>>>> in
>>>>
>>>>> error, please notify the sender and delete all copies of this message.
>>>>> Accelerite, a Persistent Systems business does not accept any liability
>>>>>
>>>> for
>>>>
>>>>> virus infected mails.
>>>>>
>>>>
>
Re: KVM disk cache option has no effect
Posted by Yuriy Karpel <yu...@karpel.su>.
It does not work on 4.9. It is necessary to register bug jira.
2016-08-25 11:22 GMT+03:00 (IMIS) Enzo Bettini <en...@imisglobal.com>:
> Hi,
>
> I can confirm the same behavior on CentOS 7.2.1511 with CloudStack 4.8.0.
>
> Regards,
> Enzo
>
>
> On 25/08/2016 09:42, Andrei Mikhailovsky wrote:
>
>> I've noticed the same behaviour on kvm with ubuntu 14.04 servers on acs
>> 4.7.1.1
>>
>> Andrei
>>
>> ----- Original Message -----
>>
>>> From: "Yuriy Karpel" <yu...@karpel.su>
>>> To: "users" <us...@cloudstack.apache.org>
>>> Sent: Thursday, 25 August, 2016 07:58:56
>>> Subject: Re: KVM disk cache option has no effect
>>> CentOS management and kvm node, Cloudstack 4.7.1, Storage RBD.
>>>
>>> Added value in the table, UI shows that the caching policy WB:
>>>
>>> 151 4 test_cache a6c0b591-0ca7-4938-91f4-8ed961f490b6 test_cache 0 Disk
>>> (null) 0 0 (null) 0 1 (null) 25.08.2016 6:35:07 0 1 (null) (null) (null)
>>> (null) (null) (null) (null) Active (null) writeback thin
>>>
>>>
>>>
>>> Created drive and connected it to the VM, the cache setting is "none":
>>>
>>> <disk type='network' device='disk'>
>>> <driver name='qemu' type='raw' cache='none'/>
>>> <auth username='admin'>
>>> <secret type='ceph' uuid='f5efdbfb-8fe7-3dfd-bc07-
>>> 5088222d8b84'/>
>>> </auth>
>>> <source protocol='rbd'
>>> name='rbd-cl/59053122-a711-45d5-a801-8b3858d84cdc'>
>>> <host name='ceph-mon.test.cloud' port='6789'/>
>>> </source>
>>> <backingStore/>
>>> <target dev='vdb' bus='virtio'/>
>>> <serial>59053122a71145d5a801</serial>
>>> <alias name='virtio-disk1'/>
>>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>>> function='0x0'/>
>>> </disk>
>>>
>>>
>>>
>>>
>>>
>>> 2016-08-24 17:27 GMT+03:00 Andrija Panic <an...@gmail.com>:
>>>
>>> Hi Enzo,
>>>>
>>>> just go to table/view "disk_offering_view" and in the field "cache_mode"
>>>> insert "writeback" value....
>>>>
>>>> Be aware, that if using writeback cache with CEPH - this is not really
>>>> needed, and perhaps better to use RBD cache on ceph.conf on KVM side...
>>>> Also note, with writeback cache set - if using NFS as storage - live
>>>> migrations will not work !
>>>> With ceph and writeback cache, live migration works (libvirt limitation,
>>>> you can google it).
>>>>
>>>> Best,
>>>> Andrija
>>>>
>>>> On 24 August 2016 at 10:24, (IMIS) Enzo Bettini <en...@imisglobal.com>
>>>> wrote:
>>>>
>>>> Hi Andrei,
>>>>>
>>>>> How did you get around this? Did you manually update the VM
>>>>> configuration
>>>>> using virsh edit?
>>>>>
>>>>> Regards,
>>>>> Enzo
>>>>>
>>>>>
>>>>> On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>>>>>
>>>>> Not as far as I know (. The ticket status is closed
>>>>>>
>>>>>> Andrei
>>>>>>
>>>>>> ----- Original Message -----
>>>>>>
>>>>>> From: "Simon Weller" <sw...@ena.com>
>>>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>>>> Sent: Thursday, 12 May, 2016 14:38:35
>>>>>>> Subject: Re: KVM disk cache option has no effect
>>>>>>> All,
>>>>>>>
>>>>>>> Is there a current issue in Jira on this?
>>>>>>>
>>>>>>> - Si
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ________________________________________
>>>>>>> From: Yuriy Karpel <yu...@karpel.su>
>>>>>>> Sent: Thursday, May 12, 2016 7:07 AM
>>>>>>> To: users@cloudstack.apache.org
>>>>>>> Subject: Re: KVM disk cache option has no effect
>>>>>>>
>>>>>>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>>>>>>
>>>>>>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>>>>>>
>>>>>>> Hi Shweta,
>>>>>>>
>>>>>>>> thanks for your findings. I am very much surprised to see this was
>>>>>>>> not
>>>>>>>> discovered earlier, especially since this feature has been
>>>>>>>> implemented
>>>>>>>> many
>>>>>>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>>>>>>> impression that people are testing and reporting on the new features
>>>>>>>> before
>>>>>>>> they hit the release, which apparently is not the case, at least for
>>>>>>>> some
>>>>>>>> new features. From what I can see this feature was completed about a
>>>>>>>> year
>>>>>>>> ago.
>>>>>>>>
>>>>>>>> I've tried to reopen this issue, but i don't have the rights due to
>>>>>>>>
>>>>>>> the
>>>>
>>>>> Jira being in a temporary Lockdown mode.
>>>>>>>>
>>>>>>>> Could someone with the right access reopen this issue on the grounds
>>>>>>>> that
>>>>>>>> it was reported (by at least two individuals) that this feature is
>>>>>>>> not
>>>>>>>> working.
>>>>>>>>
>>>>>>>> Many thanks
>>>>>>>>
>>>>>>>> Andrei
>>>>>>>>
>>>>>>>> ----- Original Message -----
>>>>>>>>
>>>>>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>>>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>>>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>>>>>>> Subject: RE: KVM disk cache option has no effect
>>>>>>>>> Hi Andrei,
>>>>>>>>>
>>>>>>>>> Few days back I was also doing some testing in this area and then
>>>>>>>>> we
>>>>>>>>>
>>>>>>>>> found out
>>>>>>>>
>>>>>>>> that cache field in disk offering is just a UI or API parameter. But
>>>>>>>>>
>>>>>>>> in
>>>>
>>>>> actual
>>>>>>>>
>>>>>>>> implementation of the API we are just neglecting this parameter . So
>>>>>>>>> effectively these parameters in disk offering does nothing .
>>>>>>>>>
>>>>>>>>> Thanks
>>>>>>>>> Shweta
>>>>>>>>>
>>>>>>>>> -----Original Message-----
>>>>>>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>>>>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>>>>>>> To: users
>>>>>>>>> Subject: KVM disk cache option has no effect
>>>>>>>>>
>>>>>>>>> Hello
>>>>>>>>>
>>>>>>>>> I've been trying to use cache = writeback option for my KVM
>>>>>>>>>
>>>>>>>> hypervisor
>>>>
>>>>> with ceph
>>>>>>>>
>>>>>>>> backend storage. However, when I am launching a vm that uses the
>>>>>>>>> disk
>>>>>>>>>
>>>>>>>>> offering
>>>>>>>>
>>>>>>>> with cache=writeback, the cache setting is still set to =none
>>>>>>>>>
>>>>>>>> according
>>>>
>>>>> to the
>>>>>>>>
>>>>>>>> ps aux command.The same applies to the root as well as additional
>>>>>>>>>
>>>>>>>> data
>>>>
>>>>> volumes.
>>>>>>>>
>>>>>>>> I am using ACS 4.7.1, both management and hypervisor servers are
>>>>>>>>>
>>>>>>>> Ubuntu
>>>>
>>>>> 14.04.
>>>>>>>>
>>>>>>>> Could someone please advise on how enable writeback cache?
>>>>>>>>>
>>>>>>>>> Cheers
>>>>>>>>>
>>>>>>>>> Andrei
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> DISCLAIMER
>>>>>>>>> ==========
>>>>>>>>> This e-mail may contain privileged and confidential information
>>>>>>>>> which
>>>>>>>>> is
>>>>>>>>>
>>>>>>>>> the
>>>>>>>>
>>>>>>>> property of Accelerite, a Persistent Systems business. It is
>>>>>>>>> intended
>>>>>>>>>
>>>>>>>>> only for
>>>>>>>>
>>>>>>>> the use of the individual or entity to which it is addressed. If you
>>>>>>>>> are
>>>>>>>>>
>>>>>>>>> not
>>>>>>>>
>>>>>>>> the intended recipient, you are not authorized to read, retain,
>>>>>>>>> copy,
>>>>>>>>>
>>>>>>>>> print,
>>>>>>>>
>>>>>>>> distribute or use this message. If you have received this
>>>>>>>>>
>>>>>>>> communication
>>>>
>>>>> in
>>>>>>>>
>>>>>>>> error, please notify the sender and delete all copies of this
>>>>>>>>>
>>>>>>>> message.
>>>>
>>>>> Accelerite, a Persistent Systems business does not accept any
>>>>>>>>>
>>>>>>>> liability
>>>>
>>>>> for
>>>>>>>>
>>>>>>>> virus infected mails.
>>>>>>>>>
>>>>>>>>>
>>>> --
>>>>
>>>> Andrija Panić
>>>>
>>>
>
Re: KVM disk cache option has no effect
Posted by "(IMIS) Enzo Bettini" <en...@imisglobal.com>.
Hi,
I can confirm the same behavior on CentOS 7.2.1511 with CloudStack 4.8.0.
Regards,
Enzo
On 25/08/2016 09:42, Andrei Mikhailovsky wrote:
> I've noticed the same behaviour on kvm with ubuntu 14.04 servers on acs 4.7.1.1
>
> Andrei
>
> ----- Original Message -----
>> From: "Yuriy Karpel" <yu...@karpel.su>
>> To: "users" <us...@cloudstack.apache.org>
>> Sent: Thursday, 25 August, 2016 07:58:56
>> Subject: Re: KVM disk cache option has no effect
>> CentOS management and kvm node, Cloudstack 4.7.1, Storage RBD.
>>
>> Added value in the table, UI shows that the caching policy WB:
>>
>> 151 4 test_cache a6c0b591-0ca7-4938-91f4-8ed961f490b6 test_cache 0 Disk
>> (null) 0 0 (null) 0 1 (null) 25.08.2016 6:35:07 0 1 (null) (null) (null)
>> (null) (null) (null) (null) Active (null) writeback thin
>>
>>
>>
>> Created drive and connected it to the VM, the cache setting is "none":
>>
>> <disk type='network' device='disk'>
>> <driver name='qemu' type='raw' cache='none'/>
>> <auth username='admin'>
>> <secret type='ceph' uuid='f5efdbfb-8fe7-3dfd-bc07-5088222d8b84'/>
>> </auth>
>> <source protocol='rbd'
>> name='rbd-cl/59053122-a711-45d5-a801-8b3858d84cdc'>
>> <host name='ceph-mon.test.cloud' port='6789'/>
>> </source>
>> <backingStore/>
>> <target dev='vdb' bus='virtio'/>
>> <serial>59053122a71145d5a801</serial>
>> <alias name='virtio-disk1'/>
>> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
>> function='0x0'/>
>> </disk>
>>
>>
>>
>>
>>
>> 2016-08-24 17:27 GMT+03:00 Andrija Panic <an...@gmail.com>:
>>
>>> Hi Enzo,
>>>
>>> just go to table/view "disk_offering_view" and in the field "cache_mode"
>>> insert "writeback" value....
>>>
>>> Be aware, that if using writeback cache with CEPH - this is not really
>>> needed, and perhaps better to use RBD cache on ceph.conf on KVM side...
>>> Also note, with writeback cache set - if using NFS as storage - live
>>> migrations will not work !
>>> With ceph and writeback cache, live migration works (libvirt limitation,
>>> you can google it).
>>>
>>> Best,
>>> Andrija
>>>
>>> On 24 August 2016 at 10:24, (IMIS) Enzo Bettini <en...@imisglobal.com>
>>> wrote:
>>>
>>>> Hi Andrei,
>>>>
>>>> How did you get around this? Did you manually update the VM configuration
>>>> using virsh edit?
>>>>
>>>> Regards,
>>>> Enzo
>>>>
>>>>
>>>> On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>>>>
>>>>> Not as far as I know (. The ticket status is closed
>>>>>
>>>>> Andrei
>>>>>
>>>>> ----- Original Message -----
>>>>>
>>>>>> From: "Simon Weller" <sw...@ena.com>
>>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>>> Sent: Thursday, 12 May, 2016 14:38:35
>>>>>> Subject: Re: KVM disk cache option has no effect
>>>>>> All,
>>>>>>
>>>>>> Is there a current issue in Jira on this?
>>>>>>
>>>>>> - Si
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ________________________________________
>>>>>> From: Yuriy Karpel <yu...@karpel.su>
>>>>>> Sent: Thursday, May 12, 2016 7:07 AM
>>>>>> To: users@cloudstack.apache.org
>>>>>> Subject: Re: KVM disk cache option has no effect
>>>>>>
>>>>>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>>>>>
>>>>>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>>>>>
>>>>>> Hi Shweta,
>>>>>>> thanks for your findings. I am very much surprised to see this was not
>>>>>>> discovered earlier, especially since this feature has been implemented
>>>>>>> many
>>>>>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>>>>>> impression that people are testing and reporting on the new features
>>>>>>> before
>>>>>>> they hit the release, which apparently is not the case, at least for
>>>>>>> some
>>>>>>> new features. From what I can see this feature was completed about a
>>>>>>> year
>>>>>>> ago.
>>>>>>>
>>>>>>> I've tried to reopen this issue, but i don't have the rights due to
>>> the
>>>>>>> Jira being in a temporary Lockdown mode.
>>>>>>>
>>>>>>> Could someone with the right access reopen this issue on the grounds
>>>>>>> that
>>>>>>> it was reported (by at least two individuals) that this feature is not
>>>>>>> working.
>>>>>>>
>>>>>>> Many thanks
>>>>>>>
>>>>>>> Andrei
>>>>>>>
>>>>>>> ----- Original Message -----
>>>>>>>
>>>>>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>>>>>> Subject: RE: KVM disk cache option has no effect
>>>>>>>> Hi Andrei,
>>>>>>>>
>>>>>>>> Few days back I was also doing some testing in this area and then we
>>>>>>>>
>>>>>>> found out
>>>>>>>
>>>>>>>> that cache field in disk offering is just a UI or API parameter. But
>>> in
>>>>>>> actual
>>>>>>>
>>>>>>>> implementation of the API we are just neglecting this parameter . So
>>>>>>>> effectively these parameters in disk offering does nothing .
>>>>>>>>
>>>>>>>> Thanks
>>>>>>>> Shweta
>>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>>>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>>>>>> To: users
>>>>>>>> Subject: KVM disk cache option has no effect
>>>>>>>>
>>>>>>>> Hello
>>>>>>>>
>>>>>>>> I've been trying to use cache = writeback option for my KVM
>>> hypervisor
>>>>>>> with ceph
>>>>>>>
>>>>>>>> backend storage. However, when I am launching a vm that uses the disk
>>>>>>>>
>>>>>>> offering
>>>>>>>
>>>>>>>> with cache=writeback, the cache setting is still set to =none
>>> according
>>>>>>> to the
>>>>>>>
>>>>>>>> ps aux command.The same applies to the root as well as additional
>>> data
>>>>>>> volumes.
>>>>>>>
>>>>>>>> I am using ACS 4.7.1, both management and hypervisor servers are
>>> Ubuntu
>>>>>>> 14.04.
>>>>>>>
>>>>>>>> Could someone please advise on how enable writeback cache?
>>>>>>>>
>>>>>>>> Cheers
>>>>>>>>
>>>>>>>> Andrei
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> DISCLAIMER
>>>>>>>> ==========
>>>>>>>> This e-mail may contain privileged and confidential information which
>>>>>>>> is
>>>>>>>>
>>>>>>> the
>>>>>>>
>>>>>>>> property of Accelerite, a Persistent Systems business. It is intended
>>>>>>>>
>>>>>>> only for
>>>>>>>
>>>>>>>> the use of the individual or entity to which it is addressed. If you
>>>>>>>> are
>>>>>>>>
>>>>>>> not
>>>>>>>
>>>>>>>> the intended recipient, you are not authorized to read, retain, copy,
>>>>>>>>
>>>>>>> print,
>>>>>>>
>>>>>>>> distribute or use this message. If you have received this
>>> communication
>>>>>>> in
>>>>>>>
>>>>>>>> error, please notify the sender and delete all copies of this
>>> message.
>>>>>>>> Accelerite, a Persistent Systems business does not accept any
>>> liability
>>>>>>> for
>>>>>>>
>>>>>>>> virus infected mails.
>>>>>>>>
>>>
>>> --
>>>
>>> Andrija Pani\u0107
Re: KVM disk cache option has no effect
Posted by Andrei Mikhailovsky <an...@arhont.com.INVALID>.
I've noticed the same behaviour on kvm with ubuntu 14.04 servers on acs 4.7.1.1
Andrei
----- Original Message -----
> From: "Yuriy Karpel" <yu...@karpel.su>
> To: "users" <us...@cloudstack.apache.org>
> Sent: Thursday, 25 August, 2016 07:58:56
> Subject: Re: KVM disk cache option has no effect
> CentOS management and kvm node, Cloudstack 4.7.1, Storage RBD.
>
> Added value in the table, UI shows that the caching policy WB:
>
> 151 4 test_cache a6c0b591-0ca7-4938-91f4-8ed961f490b6 test_cache 0 Disk
> (null) 0 0 (null) 0 1 (null) 25.08.2016 6:35:07 0 1 (null) (null) (null)
> (null) (null) (null) (null) Active (null) writeback thin
>
>
>
> Created drive and connected it to the VM, the cache setting is "none":
>
> <disk type='network' device='disk'>
> <driver name='qemu' type='raw' cache='none'/>
> <auth username='admin'>
> <secret type='ceph' uuid='f5efdbfb-8fe7-3dfd-bc07-5088222d8b84'/>
> </auth>
> <source protocol='rbd'
> name='rbd-cl/59053122-a711-45d5-a801-8b3858d84cdc'>
> <host name='ceph-mon.test.cloud' port='6789'/>
> </source>
> <backingStore/>
> <target dev='vdb' bus='virtio'/>
> <serial>59053122a71145d5a801</serial>
> <alias name='virtio-disk1'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> function='0x0'/>
> </disk>
>
>
>
>
>
> 2016-08-24 17:27 GMT+03:00 Andrija Panic <an...@gmail.com>:
>
>> Hi Enzo,
>>
>> just go to table/view "disk_offering_view" and in the field "cache_mode"
>> insert "writeback" value....
>>
>> Be aware, that if using writeback cache with CEPH - this is not really
>> needed, and perhaps better to use RBD cache on ceph.conf on KVM side...
>> Also note, with writeback cache set - if using NFS as storage - live
>> migrations will not work !
>> With ceph and writeback cache, live migration works (libvirt limitation,
>> you can google it).
>>
>> Best,
>> Andrija
>>
>> On 24 August 2016 at 10:24, (IMIS) Enzo Bettini <en...@imisglobal.com>
>> wrote:
>>
>> > Hi Andrei,
>> >
>> > How did you get around this? Did you manually update the VM configuration
>> > using virsh edit?
>> >
>> > Regards,
>> > Enzo
>> >
>> >
>> > On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>> >
>> >> Not as far as I know (. The ticket status is closed
>> >>
>> >> Andrei
>> >>
>> >> ----- Original Message -----
>> >>
>> >>> From: "Simon Weller" <sw...@ena.com>
>> >>> To: "users" <us...@cloudstack.apache.org>
>> >>> Sent: Thursday, 12 May, 2016 14:38:35
>> >>> Subject: Re: KVM disk cache option has no effect
>> >>> All,
>> >>>
>> >>> Is there a current issue in Jira on this?
>> >>>
>> >>> - Si
>> >>>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> ________________________________________
>> >>> From: Yuriy Karpel <yu...@karpel.su>
>> >>> Sent: Thursday, May 12, 2016 7:07 AM
>> >>> To: users@cloudstack.apache.org
>> >>> Subject: Re: KVM disk cache option has no effect
>> >>>
>> >>> The same function does not work on centos + ceph. CloudStack 4.7.1
>> >>>
>> >>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>> >>>
>> >>> Hi Shweta,
>> >>>>
>> >>>> thanks for your findings. I am very much surprised to see this was not
>> >>>> discovered earlier, especially since this feature has been implemented
>> >>>> many
>> >>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>> >>>> impression that people are testing and reporting on the new features
>> >>>> before
>> >>>> they hit the release, which apparently is not the case, at least for
>> >>>> some
>> >>>> new features. From what I can see this feature was completed about a
>> >>>> year
>> >>>> ago.
>> >>>>
>> >>>> I've tried to reopen this issue, but i don't have the rights due to
>> the
>> >>>> Jira being in a temporary Lockdown mode.
>> >>>>
>> >>>> Could someone with the right access reopen this issue on the grounds
>> >>>> that
>> >>>> it was reported (by at least two individuals) that this feature is not
>> >>>> working.
>> >>>>
>> >>>> Many thanks
>> >>>>
>> >>>> Andrei
>> >>>>
>> >>>> ----- Original Message -----
>> >>>>
>> >>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>> >>>>> To: "users" <us...@cloudstack.apache.org>
>> >>>>> Sent: Thursday, 12 May, 2016 12:02:59
>> >>>>> Subject: RE: KVM disk cache option has no effect
>> >>>>> Hi Andrei,
>> >>>>>
>> >>>>> Few days back I was also doing some testing in this area and then we
>> >>>>>
>> >>>> found out
>> >>>>
>> >>>>> that cache field in disk offering is just a UI or API parameter. But
>> in
>> >>>>>
>> >>>> actual
>> >>>>
>> >>>>> implementation of the API we are just neglecting this parameter . So
>> >>>>> effectively these parameters in disk offering does nothing .
>> >>>>>
>> >>>>> Thanks
>> >>>>> Shweta
>> >>>>>
>> >>>>> -----Original Message-----
>> >>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>> >>>>> Sent: Thursday, May 12, 2016 4:07 PM
>> >>>>> To: users
>> >>>>> Subject: KVM disk cache option has no effect
>> >>>>>
>> >>>>> Hello
>> >>>>>
>> >>>>> I've been trying to use cache = writeback option for my KVM
>> hypervisor
>> >>>>>
>> >>>> with ceph
>> >>>>
>> >>>>> backend storage. However, when I am launching a vm that uses the disk
>> >>>>>
>> >>>> offering
>> >>>>
>> >>>>> with cache=writeback, the cache setting is still set to =none
>> according
>> >>>>>
>> >>>> to the
>> >>>>
>> >>>>> ps aux command.The same applies to the root as well as additional
>> data
>> >>>>>
>> >>>> volumes.
>> >>>>
>> >>>>> I am using ACS 4.7.1, both management and hypervisor servers are
>> Ubuntu
>> >>>>>
>> >>>> 14.04.
>> >>>>
>> >>>>>
>> >>>>> Could someone please advise on how enable writeback cache?
>> >>>>>
>> >>>>> Cheers
>> >>>>>
>> >>>>> Andrei
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> DISCLAIMER
>> >>>>> ==========
>> >>>>> This e-mail may contain privileged and confidential information which
>> >>>>> is
>> >>>>>
>> >>>> the
>> >>>>
>> >>>>> property of Accelerite, a Persistent Systems business. It is intended
>> >>>>>
>> >>>> only for
>> >>>>
>> >>>>> the use of the individual or entity to which it is addressed. If you
>> >>>>> are
>> >>>>>
>> >>>> not
>> >>>>
>> >>>>> the intended recipient, you are not authorized to read, retain, copy,
>> >>>>>
>> >>>> print,
>> >>>>
>> >>>>> distribute or use this message. If you have received this
>> communication
>> >>>>>
>> >>>> in
>> >>>>
>> >>>>> error, please notify the sender and delete all copies of this
>> message.
>> >>>>> Accelerite, a Persistent Systems business does not accept any
>> liability
>> >>>>>
>> >>>> for
>> >>>>
>> >>>>> virus infected mails.
>> >>>>>
>> >>>>
>> >
>>
>>
>> --
>>
>> Andrija Panić
Re: KVM disk cache option has no effect
Posted by Yuriy Karpel <yu...@karpel.su>.
CentOS management and kvm node, Cloudstack 4.7.1, Storage RBD.
Added value in the table, UI shows that the caching policy WB:
151 4 test_cache a6c0b591-0ca7-4938-91f4-8ed961f490b6 test_cache 0 Disk
(null) 0 0 (null) 0 1 (null) 25.08.2016 6:35:07 0 1 (null) (null) (null)
(null) (null) (null) (null) Active (null) writeback thin
Created drive and connected it to the VM, the cache setting is "none":
<disk type='network' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<auth username='admin'>
<secret type='ceph' uuid='f5efdbfb-8fe7-3dfd-bc07-5088222d8b84'/>
</auth>
<source protocol='rbd'
name='rbd-cl/59053122-a711-45d5-a801-8b3858d84cdc'>
<host name='ceph-mon.test.cloud' port='6789'/>
</source>
<backingStore/>
<target dev='vdb' bus='virtio'/>
<serial>59053122a71145d5a801</serial>
<alias name='virtio-disk1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</disk>
2016-08-24 17:27 GMT+03:00 Andrija Panic <an...@gmail.com>:
> Hi Enzo,
>
> just go to table/view "disk_offering_view" and in the field "cache_mode"
> insert "writeback" value....
>
> Be aware, that if using writeback cache with CEPH - this is not really
> needed, and perhaps better to use RBD cache on ceph.conf on KVM side...
> Also note, with writeback cache set - if using NFS as storage - live
> migrations will not work !
> With ceph and writeback cache, live migration works (libvirt limitation,
> you can google it).
>
> Best,
> Andrija
>
> On 24 August 2016 at 10:24, (IMIS) Enzo Bettini <en...@imisglobal.com>
> wrote:
>
> > Hi Andrei,
> >
> > How did you get around this? Did you manually update the VM configuration
> > using virsh edit?
> >
> > Regards,
> > Enzo
> >
> >
> > On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
> >
> >> Not as far as I know (. The ticket status is closed
> >>
> >> Andrei
> >>
> >> ----- Original Message -----
> >>
> >>> From: "Simon Weller" <sw...@ena.com>
> >>> To: "users" <us...@cloudstack.apache.org>
> >>> Sent: Thursday, 12 May, 2016 14:38:35
> >>> Subject: Re: KVM disk cache option has no effect
> >>> All,
> >>>
> >>> Is there a current issue in Jira on this?
> >>>
> >>> - Si
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> ________________________________________
> >>> From: Yuriy Karpel <yu...@karpel.su>
> >>> Sent: Thursday, May 12, 2016 7:07 AM
> >>> To: users@cloudstack.apache.org
> >>> Subject: Re: KVM disk cache option has no effect
> >>>
> >>> The same function does not work on centos + ceph. CloudStack 4.7.1
> >>>
> >>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
> >>>
> >>> Hi Shweta,
> >>>>
> >>>> thanks for your findings. I am very much surprised to see this was not
> >>>> discovered earlier, especially since this feature has been implemented
> >>>> many
> >>>> versions back (back in version 4.4 or 4.5 i think). I was under the
> >>>> impression that people are testing and reporting on the new features
> >>>> before
> >>>> they hit the release, which apparently is not the case, at least for
> >>>> some
> >>>> new features. From what I can see this feature was completed about a
> >>>> year
> >>>> ago.
> >>>>
> >>>> I've tried to reopen this issue, but i don't have the rights due to
> the
> >>>> Jira being in a temporary Lockdown mode.
> >>>>
> >>>> Could someone with the right access reopen this issue on the grounds
> >>>> that
> >>>> it was reported (by at least two individuals) that this feature is not
> >>>> working.
> >>>>
> >>>> Many thanks
> >>>>
> >>>> Andrei
> >>>>
> >>>> ----- Original Message -----
> >>>>
> >>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
> >>>>> To: "users" <us...@cloudstack.apache.org>
> >>>>> Sent: Thursday, 12 May, 2016 12:02:59
> >>>>> Subject: RE: KVM disk cache option has no effect
> >>>>> Hi Andrei,
> >>>>>
> >>>>> Few days back I was also doing some testing in this area and then we
> >>>>>
> >>>> found out
> >>>>
> >>>>> that cache field in disk offering is just a UI or API parameter. But
> in
> >>>>>
> >>>> actual
> >>>>
> >>>>> implementation of the API we are just neglecting this parameter . So
> >>>>> effectively these parameters in disk offering does nothing .
> >>>>>
> >>>>> Thanks
> >>>>> Shweta
> >>>>>
> >>>>> -----Original Message-----
> >>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
> >>>>> Sent: Thursday, May 12, 2016 4:07 PM
> >>>>> To: users
> >>>>> Subject: KVM disk cache option has no effect
> >>>>>
> >>>>> Hello
> >>>>>
> >>>>> I've been trying to use cache = writeback option for my KVM
> hypervisor
> >>>>>
> >>>> with ceph
> >>>>
> >>>>> backend storage. However, when I am launching a vm that uses the disk
> >>>>>
> >>>> offering
> >>>>
> >>>>> with cache=writeback, the cache setting is still set to =none
> according
> >>>>>
> >>>> to the
> >>>>
> >>>>> ps aux command.The same applies to the root as well as additional
> data
> >>>>>
> >>>> volumes.
> >>>>
> >>>>> I am using ACS 4.7.1, both management and hypervisor servers are
> Ubuntu
> >>>>>
> >>>> 14.04.
> >>>>
> >>>>>
> >>>>> Could someone please advise on how enable writeback cache?
> >>>>>
> >>>>> Cheers
> >>>>>
> >>>>> Andrei
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> DISCLAIMER
> >>>>> ==========
> >>>>> This e-mail may contain privileged and confidential information which
> >>>>> is
> >>>>>
> >>>> the
> >>>>
> >>>>> property of Accelerite, a Persistent Systems business. It is intended
> >>>>>
> >>>> only for
> >>>>
> >>>>> the use of the individual or entity to which it is addressed. If you
> >>>>> are
> >>>>>
> >>>> not
> >>>>
> >>>>> the intended recipient, you are not authorized to read, retain, copy,
> >>>>>
> >>>> print,
> >>>>
> >>>>> distribute or use this message. If you have received this
> communication
> >>>>>
> >>>> in
> >>>>
> >>>>> error, please notify the sender and delete all copies of this
> message.
> >>>>> Accelerite, a Persistent Systems business does not accept any
> liability
> >>>>>
> >>>> for
> >>>>
> >>>>> virus infected mails.
> >>>>>
> >>>>
> >
>
>
> --
>
> Andrija Panić
>
Re: KVM disk cache option has no effect
Posted by Andrija Panic <an...@gmail.com>.
Hi Enzo,
just go to table/view "disk_offering_view" and in the field "cache_mode"
insert "writeback" value....
Be aware, that if using writeback cache with CEPH - this is not really
needed, and perhaps better to use RBD cache on ceph.conf on KVM side...
Also note, with writeback cache set - if using NFS as storage - live
migrations will not work !
With ceph and writeback cache, live migration works (libvirt limitation,
you can google it).
Best,
Andrija
On 24 August 2016 at 10:24, (IMIS) Enzo Bettini <en...@imisglobal.com>
wrote:
> Hi Andrei,
>
> How did you get around this? Did you manually update the VM configuration
> using virsh edit?
>
> Regards,
> Enzo
>
>
> On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
>
>> Not as far as I know (. The ticket status is closed
>>
>> Andrei
>>
>> ----- Original Message -----
>>
>>> From: "Simon Weller" <sw...@ena.com>
>>> To: "users" <us...@cloudstack.apache.org>
>>> Sent: Thursday, 12 May, 2016 14:38:35
>>> Subject: Re: KVM disk cache option has no effect
>>> All,
>>>
>>> Is there a current issue in Jira on this?
>>>
>>> - Si
>>>
>>>
>>>
>>>
>>>
>>> ________________________________________
>>> From: Yuriy Karpel <yu...@karpel.su>
>>> Sent: Thursday, May 12, 2016 7:07 AM
>>> To: users@cloudstack.apache.org
>>> Subject: Re: KVM disk cache option has no effect
>>>
>>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>>
>>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>>
>>> Hi Shweta,
>>>>
>>>> thanks for your findings. I am very much surprised to see this was not
>>>> discovered earlier, especially since this feature has been implemented
>>>> many
>>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>>> impression that people are testing and reporting on the new features
>>>> before
>>>> they hit the release, which apparently is not the case, at least for
>>>> some
>>>> new features. From what I can see this feature was completed about a
>>>> year
>>>> ago.
>>>>
>>>> I've tried to reopen this issue, but i don't have the rights due to the
>>>> Jira being in a temporary Lockdown mode.
>>>>
>>>> Could someone with the right access reopen this issue on the grounds
>>>> that
>>>> it was reported (by at least two individuals) that this feature is not
>>>> working.
>>>>
>>>> Many thanks
>>>>
>>>> Andrei
>>>>
>>>> ----- Original Message -----
>>>>
>>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>>> To: "users" <us...@cloudstack.apache.org>
>>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>>> Subject: RE: KVM disk cache option has no effect
>>>>> Hi Andrei,
>>>>>
>>>>> Few days back I was also doing some testing in this area and then we
>>>>>
>>>> found out
>>>>
>>>>> that cache field in disk offering is just a UI or API parameter. But in
>>>>>
>>>> actual
>>>>
>>>>> implementation of the API we are just neglecting this parameter . So
>>>>> effectively these parameters in disk offering does nothing .
>>>>>
>>>>> Thanks
>>>>> Shweta
>>>>>
>>>>> -----Original Message-----
>>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>>> To: users
>>>>> Subject: KVM disk cache option has no effect
>>>>>
>>>>> Hello
>>>>>
>>>>> I've been trying to use cache = writeback option for my KVM hypervisor
>>>>>
>>>> with ceph
>>>>
>>>>> backend storage. However, when I am launching a vm that uses the disk
>>>>>
>>>> offering
>>>>
>>>>> with cache=writeback, the cache setting is still set to =none according
>>>>>
>>>> to the
>>>>
>>>>> ps aux command.The same applies to the root as well as additional data
>>>>>
>>>> volumes.
>>>>
>>>>> I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
>>>>>
>>>> 14.04.
>>>>
>>>>>
>>>>> Could someone please advise on how enable writeback cache?
>>>>>
>>>>> Cheers
>>>>>
>>>>> Andrei
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> DISCLAIMER
>>>>> ==========
>>>>> This e-mail may contain privileged and confidential information which
>>>>> is
>>>>>
>>>> the
>>>>
>>>>> property of Accelerite, a Persistent Systems business. It is intended
>>>>>
>>>> only for
>>>>
>>>>> the use of the individual or entity to which it is addressed. If you
>>>>> are
>>>>>
>>>> not
>>>>
>>>>> the intended recipient, you are not authorized to read, retain, copy,
>>>>>
>>>> print,
>>>>
>>>>> distribute or use this message. If you have received this communication
>>>>>
>>>> in
>>>>
>>>>> error, please notify the sender and delete all copies of this message.
>>>>> Accelerite, a Persistent Systems business does not accept any liability
>>>>>
>>>> for
>>>>
>>>>> virus infected mails.
>>>>>
>>>>
>
--
Andrija Panić
Re: KVM disk cache option has no effect
Posted by "(IMIS) Enzo Bettini" <en...@imisglobal.com>.
Hi Andrei,
How did you get around this? Did you manually update the VM
configuration using virsh edit?
Regards,
Enzo
On 15/05/2016 00:31, Andrei Mikhailovsky wrote:
> Not as far as I know (. The ticket status is closed
>
> Andrei
>
> ----- Original Message -----
>> From: "Simon Weller" <sw...@ena.com>
>> To: "users" <us...@cloudstack.apache.org>
>> Sent: Thursday, 12 May, 2016 14:38:35
>> Subject: Re: KVM disk cache option has no effect
>> All,
>>
>> Is there a current issue in Jira on this?
>>
>> - Si
>>
>>
>>
>>
>>
>> ________________________________________
>> From: Yuriy Karpel <yu...@karpel.su>
>> Sent: Thursday, May 12, 2016 7:07 AM
>> To: users@cloudstack.apache.org
>> Subject: Re: KVM disk cache option has no effect
>>
>> The same function does not work on centos + ceph. CloudStack 4.7.1
>>
>> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>>
>>> Hi Shweta,
>>>
>>> thanks for your findings. I am very much surprised to see this was not
>>> discovered earlier, especially since this feature has been implemented many
>>> versions back (back in version 4.4 or 4.5 i think). I was under the
>>> impression that people are testing and reporting on the new features before
>>> they hit the release, which apparently is not the case, at least for some
>>> new features. From what I can see this feature was completed about a year
>>> ago.
>>>
>>> I've tried to reopen this issue, but i don't have the rights due to the
>>> Jira being in a temporary Lockdown mode.
>>>
>>> Could someone with the right access reopen this issue on the grounds that
>>> it was reported (by at least two individuals) that this feature is not
>>> working.
>>>
>>> Many thanks
>>>
>>> Andrei
>>>
>>> ----- Original Message -----
>>>> From: "Shweta Agarwal" <sh...@accelerite.com>
>>>> To: "users" <us...@cloudstack.apache.org>
>>>> Sent: Thursday, 12 May, 2016 12:02:59
>>>> Subject: RE: KVM disk cache option has no effect
>>>> Hi Andrei,
>>>>
>>>> Few days back I was also doing some testing in this area and then we
>>> found out
>>>> that cache field in disk offering is just a UI or API parameter. But in
>>> actual
>>>> implementation of the API we are just neglecting this parameter . So
>>>> effectively these parameters in disk offering does nothing .
>>>>
>>>> Thanks
>>>> Shweta
>>>>
>>>> -----Original Message-----
>>>> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>>>> Sent: Thursday, May 12, 2016 4:07 PM
>>>> To: users
>>>> Subject: KVM disk cache option has no effect
>>>>
>>>> Hello
>>>>
>>>> I've been trying to use cache = writeback option for my KVM hypervisor
>>> with ceph
>>>> backend storage. However, when I am launching a vm that uses the disk
>>> offering
>>>> with cache=writeback, the cache setting is still set to =none according
>>> to the
>>>> ps aux command.The same applies to the root as well as additional data
>>> volumes.
>>>> I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
>>> 14.04.
>>>>
>>>> Could someone please advise on how enable writeback cache?
>>>>
>>>> Cheers
>>>>
>>>> Andrei
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> DISCLAIMER
>>>> ==========
>>>> This e-mail may contain privileged and confidential information which is
>>> the
>>>> property of Accelerite, a Persistent Systems business. It is intended
>>> only for
>>>> the use of the individual or entity to which it is addressed. If you are
>>> not
>>>> the intended recipient, you are not authorized to read, retain, copy,
>>> print,
>>>> distribute or use this message. If you have received this communication
>>> in
>>>> error, please notify the sender and delete all copies of this message.
>>>> Accelerite, a Persistent Systems business does not accept any liability
>>> for
>>>> virus infected mails.
Re: KVM disk cache option has no effect
Posted by Andrei Mikhailovsky <an...@arhont.com>.
Not as far as I know (. The ticket status is closed
Andrei
----- Original Message -----
> From: "Simon Weller" <sw...@ena.com>
> To: "users" <us...@cloudstack.apache.org>
> Sent: Thursday, 12 May, 2016 14:38:35
> Subject: Re: KVM disk cache option has no effect
> All,
>
> Is there a current issue in Jira on this?
>
> - Si
>
>
>
>
>
> ________________________________________
> From: Yuriy Karpel <yu...@karpel.su>
> Sent: Thursday, May 12, 2016 7:07 AM
> To: users@cloudstack.apache.org
> Subject: Re: KVM disk cache option has no effect
>
> The same function does not work on centos + ceph. CloudStack 4.7.1
>
> 2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
>
>> Hi Shweta,
>>
>> thanks for your findings. I am very much surprised to see this was not
>> discovered earlier, especially since this feature has been implemented many
>> versions back (back in version 4.4 or 4.5 i think). I was under the
>> impression that people are testing and reporting on the new features before
>> they hit the release, which apparently is not the case, at least for some
>> new features. From what I can see this feature was completed about a year
>> ago.
>>
>> I've tried to reopen this issue, but i don't have the rights due to the
>> Jira being in a temporary Lockdown mode.
>>
>> Could someone with the right access reopen this issue on the grounds that
>> it was reported (by at least two individuals) that this feature is not
>> working.
>>
>> Many thanks
>>
>> Andrei
>>
>> ----- Original Message -----
>> > From: "Shweta Agarwal" <sh...@accelerite.com>
>> > To: "users" <us...@cloudstack.apache.org>
>> > Sent: Thursday, 12 May, 2016 12:02:59
>> > Subject: RE: KVM disk cache option has no effect
>>
>> > Hi Andrei,
>> >
>> > Few days back I was also doing some testing in this area and then we
>> found out
>> > that cache field in disk offering is just a UI or API parameter. But in
>> actual
>> > implementation of the API we are just neglecting this parameter . So
>> > effectively these parameters in disk offering does nothing .
>> >
>> > Thanks
>> > Shweta
>> >
>> > -----Original Message-----
>> > From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
>> > Sent: Thursday, May 12, 2016 4:07 PM
>> > To: users
>> > Subject: KVM disk cache option has no effect
>> >
>> > Hello
>> >
>> > I've been trying to use cache = writeback option for my KVM hypervisor
>> with ceph
>> > backend storage. However, when I am launching a vm that uses the disk
>> offering
>> > with cache=writeback, the cache setting is still set to =none according
>> to the
>> > ps aux command.The same applies to the root as well as additional data
>> volumes.
>> >
>> > I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
>> 14.04.
>> >
>> >
>> > Could someone please advise on how enable writeback cache?
>> >
>> > Cheers
>> >
>> > Andrei
>> >
>> >
>> >
>> >
>> >
>> > DISCLAIMER
>> > ==========
>> > This e-mail may contain privileged and confidential information which is
>> the
>> > property of Accelerite, a Persistent Systems business. It is intended
>> only for
>> > the use of the individual or entity to which it is addressed. If you are
>> not
>> > the intended recipient, you are not authorized to read, retain, copy,
>> print,
>> > distribute or use this message. If you have received this communication
>> in
>> > error, please notify the sender and delete all copies of this message.
>> > Accelerite, a Persistent Systems business does not accept any liability
>> for
>> > virus infected mails.
Re: KVM disk cache option has no effect
Posted by Simon Weller <sw...@ena.com>.
All,
Is there a current issue in Jira on this?
- Si
________________________________________
From: Yuriy Karpel <yu...@karpel.su>
Sent: Thursday, May 12, 2016 7:07 AM
To: users@cloudstack.apache.org
Subject: Re: KVM disk cache option has no effect
The same function does not work on centos + ceph. CloudStack 4.7.1
2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
> Hi Shweta,
>
> thanks for your findings. I am very much surprised to see this was not
> discovered earlier, especially since this feature has been implemented many
> versions back (back in version 4.4 or 4.5 i think). I was under the
> impression that people are testing and reporting on the new features before
> they hit the release, which apparently is not the case, at least for some
> new features. From what I can see this feature was completed about a year
> ago.
>
> I've tried to reopen this issue, but i don't have the rights due to the
> Jira being in a temporary Lockdown mode.
>
> Could someone with the right access reopen this issue on the grounds that
> it was reported (by at least two individuals) that this feature is not
> working.
>
> Many thanks
>
> Andrei
>
> ----- Original Message -----
> > From: "Shweta Agarwal" <sh...@accelerite.com>
> > To: "users" <us...@cloudstack.apache.org>
> > Sent: Thursday, 12 May, 2016 12:02:59
> > Subject: RE: KVM disk cache option has no effect
>
> > Hi Andrei,
> >
> > Few days back I was also doing some testing in this area and then we
> found out
> > that cache field in disk offering is just a UI or API parameter. But in
> actual
> > implementation of the API we are just neglecting this parameter . So
> > effectively these parameters in disk offering does nothing .
> >
> > Thanks
> > Shweta
> >
> > -----Original Message-----
> > From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
> > Sent: Thursday, May 12, 2016 4:07 PM
> > To: users
> > Subject: KVM disk cache option has no effect
> >
> > Hello
> >
> > I've been trying to use cache = writeback option for my KVM hypervisor
> with ceph
> > backend storage. However, when I am launching a vm that uses the disk
> offering
> > with cache=writeback, the cache setting is still set to =none according
> to the
> > ps aux command.The same applies to the root as well as additional data
> volumes.
> >
> > I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
> 14.04.
> >
> >
> > Could someone please advise on how enable writeback cache?
> >
> > Cheers
> >
> > Andrei
> >
> >
> >
> >
> >
> > DISCLAIMER
> > ==========
> > This e-mail may contain privileged and confidential information which is
> the
> > property of Accelerite, a Persistent Systems business. It is intended
> only for
> > the use of the individual or entity to which it is addressed. If you are
> not
> > the intended recipient, you are not authorized to read, retain, copy,
> print,
> > distribute or use this message. If you have received this communication
> in
> > error, please notify the sender and delete all copies of this message.
> > Accelerite, a Persistent Systems business does not accept any liability
> for
> > virus infected mails.
>
Re: KVM disk cache option has no effect
Posted by Yuriy Karpel <yu...@karpel.su>.
The same function does not work on centos + ceph. CloudStack 4.7.1
2016-05-12 14:29 GMT+03:00 Andrei Mikhailovsky <an...@arhont.com>:
> Hi Shweta,
>
> thanks for your findings. I am very much surprised to see this was not
> discovered earlier, especially since this feature has been implemented many
> versions back (back in version 4.4 or 4.5 i think). I was under the
> impression that people are testing and reporting on the new features before
> they hit the release, which apparently is not the case, at least for some
> new features. From what I can see this feature was completed about a year
> ago.
>
> I've tried to reopen this issue, but i don't have the rights due to the
> Jira being in a temporary Lockdown mode.
>
> Could someone with the right access reopen this issue on the grounds that
> it was reported (by at least two individuals) that this feature is not
> working.
>
> Many thanks
>
> Andrei
>
> ----- Original Message -----
> > From: "Shweta Agarwal" <sh...@accelerite.com>
> > To: "users" <us...@cloudstack.apache.org>
> > Sent: Thursday, 12 May, 2016 12:02:59
> > Subject: RE: KVM disk cache option has no effect
>
> > Hi Andrei,
> >
> > Few days back I was also doing some testing in this area and then we
> found out
> > that cache field in disk offering is just a UI or API parameter. But in
> actual
> > implementation of the API we are just neglecting this parameter . So
> > effectively these parameters in disk offering does nothing .
> >
> > Thanks
> > Shweta
> >
> > -----Original Message-----
> > From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
> > Sent: Thursday, May 12, 2016 4:07 PM
> > To: users
> > Subject: KVM disk cache option has no effect
> >
> > Hello
> >
> > I've been trying to use cache = writeback option for my KVM hypervisor
> with ceph
> > backend storage. However, when I am launching a vm that uses the disk
> offering
> > with cache=writeback, the cache setting is still set to =none according
> to the
> > ps aux command.The same applies to the root as well as additional data
> volumes.
> >
> > I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu
> 14.04.
> >
> >
> > Could someone please advise on how enable writeback cache?
> >
> > Cheers
> >
> > Andrei
> >
> >
> >
> >
> >
> > DISCLAIMER
> > ==========
> > This e-mail may contain privileged and confidential information which is
> the
> > property of Accelerite, a Persistent Systems business. It is intended
> only for
> > the use of the individual or entity to which it is addressed. If you are
> not
> > the intended recipient, you are not authorized to read, retain, copy,
> print,
> > distribute or use this message. If you have received this communication
> in
> > error, please notify the sender and delete all copies of this message.
> > Accelerite, a Persistent Systems business does not accept any liability
> for
> > virus infected mails.
>
Re: KVM disk cache option has no effect
Posted by Andrei Mikhailovsky <an...@arhont.com>.
Hi Shweta,
thanks for your findings. I am very much surprised to see this was not discovered earlier, especially since this feature has been implemented many versions back (back in version 4.4 or 4.5 i think). I was under the impression that people are testing and reporting on the new features before they hit the release, which apparently is not the case, at least for some new features. From what I can see this feature was completed about a year ago.
I've tried to reopen this issue, but i don't have the rights due to the Jira being in a temporary Lockdown mode.
Could someone with the right access reopen this issue on the grounds that it was reported (by at least two individuals) that this feature is not working.
Many thanks
Andrei
----- Original Message -----
> From: "Shweta Agarwal" <sh...@accelerite.com>
> To: "users" <us...@cloudstack.apache.org>
> Sent: Thursday, 12 May, 2016 12:02:59
> Subject: RE: KVM disk cache option has no effect
> Hi Andrei,
>
> Few days back I was also doing some testing in this area and then we found out
> that cache field in disk offering is just a UI or API parameter. But in actual
> implementation of the API we are just neglecting this parameter . So
> effectively these parameters in disk offering does nothing .
>
> Thanks
> Shweta
>
> -----Original Message-----
> From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
> Sent: Thursday, May 12, 2016 4:07 PM
> To: users
> Subject: KVM disk cache option has no effect
>
> Hello
>
> I've been trying to use cache = writeback option for my KVM hypervisor with ceph
> backend storage. However, when I am launching a vm that uses the disk offering
> with cache=writeback, the cache setting is still set to =none according to the
> ps aux command.The same applies to the root as well as additional data volumes.
>
> I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu 14.04.
>
>
> Could someone please advise on how enable writeback cache?
>
> Cheers
>
> Andrei
>
>
>
>
>
> DISCLAIMER
> ==========
> This e-mail may contain privileged and confidential information which is the
> property of Accelerite, a Persistent Systems business. It is intended only for
> the use of the individual or entity to which it is addressed. If you are not
> the intended recipient, you are not authorized to read, retain, copy, print,
> distribute or use this message. If you have received this communication in
> error, please notify the sender and delete all copies of this message.
> Accelerite, a Persistent Systems business does not accept any liability for
> virus infected mails.
RE: KVM disk cache option has no effect
Posted by Shweta Agarwal <sh...@accelerite.com>.
Hi Andrei,
Few days back I was also doing some testing in this area and then we found out that cache field in disk offering is just a UI or API parameter. But in actual implementation of the API we are just neglecting this parameter . So effectively these parameters in disk offering does nothing .
Thanks
Shweta
-----Original Message-----
From: Andrei Mikhailovsky [mailto:andrei@arhont.com]
Sent: Thursday, May 12, 2016 4:07 PM
To: users
Subject: KVM disk cache option has no effect
Hello
I've been trying to use cache = writeback option for my KVM hypervisor with ceph backend storage. However, when I am launching a vm that uses the disk offering with cache=writeback, the cache setting is still set to =none according to the ps aux command.The same applies to the root as well as additional data volumes.
I am using ACS 4.7.1, both management and hypervisor servers are Ubuntu 14.04.
Could someone please advise on how enable writeback cache?
Cheers
Andrei
DISCLAIMER
==========
This e-mail may contain privileged and confidential information which is the property of Accelerite, a Persistent Systems business. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Accelerite, a Persistent Systems business does not accept any liability for virus infected mails.