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Posted to users@cloudstack.apache.org by "(IMIS) Enzo Bettini" <en...@imisglobal.com> on 2016/08/24 08:24:50 UTC
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 "(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