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Posted to dev@cloudstack.apache.org by Jewel Nuruddin <je...@yahoo.com> on 2012/07/09 12:56:50 UTC
About server hardware
Hi All,
Need one comments about server hardware.
In one hypervisor I want to run 8 guest vm, what will be the main hardware I have to
take care properly!
can any one have any thought?
Thanks
Jewel
Re: About server hardware
Posted by sebastien goasguen <ru...@gmail.com>.
Hi,
That will work. How well ? not sure. I/O experts should comment on how to
tune it.
The faster the disks on your host the better, and you will want to make
sure your guest VMs have virtio.
Your notation confused me a bit.
RAM: +/- 4GB could mean a variation of 4 GB. Maybe writing RAM: ~4GB is
better.
-sebastien
On Mon, Jul 9, 2012 at 9:28 AM, Jewel Nuruddin <je...@yahoo.com>wrote:
> Hi,
>
> Thank you very much, actually I have the following scenario for hypervisor
> .
> HDD: 500 GB
> RAM: 32GB
> CPU 8 Core @2.9GHz
>
> and each guest vm is
> HDD: 50GB
> RAM: +/- 4 GB
> CPU 1 Core +/-@ 2.0 GHz
> Maximum 8 guest VM
>
> in my server two eth each gigabit
>
> I want to run some mysql and membase service which have huge disk I/O
> So is the server configuration is OK or do i need SAS HDD or something
> else?
>
> Thanks
> Jewel
>
> --- On *Mon, 7/9/12, sebastien goasguen <ru...@gmail.com>* wrote:
>
>
> From: sebastien goasguen <ru...@gmail.com>
> Subject: Re: About server hardware
> To: cloudstack-users@incubator.apache.org
> Cc: "jewel.nuruddin@yahoo.com" <je...@yahoo.com>
> Date: Monday, July 9, 2012, 10:12 PM
>
> Hi Jewel,
>
> I agree with Abhi, you would need to describe your use case in more
> details.
> Specifying the amount of resources needed for each VM and the hypervisor
> used.
>
> If you cannot overcommit memory and want 1GB per VM, then you need at
> least 8 GB RAM plus extra for hypervisor/host kernel. If you *can*
> over commit then you may choose to use less RAM on the host (<8GB ofr
> 1GB guests).
>
> Same thing with the number of cores, you could have only 4 or 6 cores
> but run 8 VMs.
>
> This is really a guest VM performance issue, as well as workload
> profile. Hypervisor experts should be able to help with different
> scenarios and identify a rule of thumb.
>
> -Sebastien
>
>
> On Mon, Jul 9, 2012 at 8:48 AM, Abhinandan Prateek
> <Ab...@citrix.com>>
> wrote:
> > Hi Jewel,
> > If you list down the requirements for the guest VM in terms of CPU,
> RAM and storage adding that to Xenserver overhead you can get the
> requirements for the hardware you need.
> > For Xenserver overhead, simple rule of thumb is to allow 512 MB for the
> XenServer total (Hypervisor plus the control domain) if there is less than
> 5 GB of memory in the server, and allow 1 GB of memory if there> Also you
> need to decide if you want HA, in that case you will need some redundant
> hardware.
> > -abhi
> >
> >>-----Original Message-----
> >>From: Jewel Nuruddin [mailto:jewel.nuruddin@yahoo.com<ht...@yahoo.com>
> ]
> >>Sent: Monday, July 09, 2012 4:27 PM
> >>To: cloudstack-dev@incubator.apache.org<ht...@incubator.apache.org>;
> cloudstack-
> >>users@incubator.apache.org<ht...@incubator.apache.org>
> >>Cc: cloudstack-users@incubator.apache.org<ht...@incubator.apache.org>
> >>Subject: About server hardware
> >>
> >>Hi All,
> >>
> >>Need one comments about server hardware.
> >>In one hypervisor I want to run 8 guest vm, what will be the main
> hardware I
> >>have to take care properly!
> >>can any one have any thought?
> >>
> >>Thanks
> >>Jewel
>
>
>
> --
> ---
> Sebastien Goasguen
> Open Source Cloud Evangelist, Cloudstack
> http://sites.google.com/site/runseb/
>
>
--
---
Sebastien Goasguen
Open Source Cloud Evangelist, Cloudstack
http://sites.google.com/site/runseb/
Re: About server hardware
Posted by Jewel Nuruddin <je...@yahoo.com>.
Hi,
Thank you very much, actually I have the following scenario for hypervisor.
HDD: 500 GB
RAM: 32GB
CPU 8 Core @2.9GHz
and each guest vm is
HDD: 50GB
RAM: +/- 4 GB
CPU 1 Core +/-@ 2.0 GHz
Maximum 8 guest VM
in my server two eth each gigabit
I want to run some mysql and membase service which have huge disk I/O
So is the server configuration is OK or do i need SAS HDD or something else?
Thanks
Jewel
--- On Mon, 7/9/12, sebastien goasguen <ru...@gmail.com> wrote:
From: sebastien goasguen <ru...@gmail.com>
Subject: Re: About server hardware
To: cloudstack-users@incubator.apache.org
Cc: "jewel.nuruddin@yahoo.com" <je...@yahoo.com>
Date: Monday, July 9, 2012, 10:12 PM
Hi Jewel,
I agree with Abhi, you would need to describe your use case in more details.
Specifying the amount of resources needed for each VM and the hypervisor used.
If you cannot overcommit memory and want 1GB per VM, then you need at
least 8 GB RAM plus extra for hypervisor/host kernel. If you *can*
over commit then you may choose to use less RAM on the host (<8GB ofr
1GB guests).
Same thing with the number of cores, you could have only 4 or 6 cores
but run 8 VMs.
This is really a guest VM performance issue, as well as workload
profile. Hypervisor experts should be able to help with different
scenarios and identify a rule of thumb.
-Sebastien
On Mon, Jul 9, 2012 at 8:48 AM, Abhinandan Prateek
<Ab...@citrix.com> wrote:
> Hi Jewel,
> If you list down the requirements for the guest VM in terms of CPU, RAM and storage adding that to Xenserver overhead you can get the requirements for the hardware you need.
> For Xenserver overhead, simple rule of thumb is to allow 512 MB for the XenServer total (Hypervisor plus the control domain) if there is less than 5 GB of memory in the server, and allow 1 GB of memory if there> Also you need to decide if you want HA, in that case you will need some redundant hardware.
> -abhi
>
>>-----Original Message-----
>>From: Jewel Nuruddin [mailto:jewel.nuruddin@yahoo.com]
>>Sent: Monday, July 09, 2012 4:27 PM
>>To: cloudstack-dev@incubator.apache.org; cloudstack-
>>users@incubator.apache.org
>>Cc: cloudstack-users@incubator.apache.org
>>Subject: About server hardware
>>
>>Hi All,
>>
>>Need one comments about server hardware.
>>In one hypervisor I want to run 8 guest vm, what will be the main hardware I
>>have to take care properly!
>>can any one have any thought?
>>
>>Thanks
>>Jewel
--
---
Sebastien Goasguen
Open Source Cloud Evangelist, Cloudstack
http://sites.google.com/site/runseb/
Re: About server hardware
Posted by sebastien goasguen <ru...@gmail.com>.
Hi Jewel,
I agree with Abhi, you would need to describe your use case in more details.
Specifying the amount of resources needed for each VM and the hypervisor used.
If you cannot overcommit memory and want 1GB per VM, then you need at
least 8 GB RAM plus extra for hypervisor/host kernel. If you *can*
over commit then you may choose to use less RAM on the host (<8GB ofr
1GB guests).
Same thing with the number of cores, you could have only 4 or 6 cores
but run 8 VMs.
This is really a guest VM performance issue, as well as workload
profile. Hypervisor experts should be able to help with different
scenarios and identify a rule of thumb.
-Sebastien
On Mon, Jul 9, 2012 at 8:48 AM, Abhinandan Prateek
<Ab...@citrix.com> wrote:
> Hi Jewel,
> If you list down the requirements for the guest VM in terms of CPU, RAM and storage adding that to Xenserver overhead you can get the requirements for the hardware you need.
> For Xenserver overhead, simple rule of thumb is to allow 512 MB for the XenServer total (Hypervisor plus the control domain) if there is less than 5 GB of memory in the server, and allow 1 GB of memory if there> Also you need to decide if you want HA, in that case you will need some redundant hardware.
> -abhi
>
>>-----Original Message-----
>>From: Jewel Nuruddin [mailto:jewel.nuruddin@yahoo.com]
>>Sent: Monday, July 09, 2012 4:27 PM
>>To: cloudstack-dev@incubator.apache.org; cloudstack-
>>users@incubator.apache.org
>>Cc: cloudstack-users@incubator.apache.org
>>Subject: About server hardware
>>
>>Hi All,
>>
>>Need one comments about server hardware.
>>In one hypervisor I want to run 8 guest vm, what will be the main hardware I
>>have to take care properly!
>>can any one have any thought?
>>
>>Thanks
>>Jewel
--
---
Sebastien Goasguen
Open Source Cloud Evangelist, Cloudstack
http://sites.google.com/site/runseb/
RE: About server hardware
Posted by Jewel Nuruddin <je...@yahoo.com>.
Hi Abhi,
Thank you very much, actually I have the following scenario for hypervisor.
HDD: 500 GB
RAM: 32GB
CPU 8 Core @2.9GHz
and each guest vm is
HDD: 50GB
RAM: +/- 4 GB
CPU 1 Core +/-@ 2.0 GHz
Maximum 8 guest VM
in my server two eth each gigabit
I want to run some mysql and membase service which have huge disk I/O
So is the server configuration is OK or do i need SAS HDD or something else?
Thanks
Jewel
--- On Mon, 7/9/12, Abhinandan Prateek <Ab...@citrix.com> wrote:
From: Abhinandan Prateek <Ab...@citrix.com>
Subject: RE: About server hardware
To: "cloudstack-users@incubator.apache.org" <cl...@incubator.apache.org>, "jewel.nuruddin@yahoo.com" <je...@yahoo.com>
Date: Monday, July 9, 2012, 9:48 PM
Hi Jewel,
If you list down the requirements for the guest VM in terms of CPU, RAM and storage adding that to Xenserver overhead you can get the requirements for the hardware you need.
For Xenserver overhead, simple rule of thumb is to allow 512 MB for the XenServer total (Hypervisor plus the control domain) if there is less than 5 GB of memory in the server, and allow 1 GB of memory if there is more than 5 GB in the server.
Also you need to decide if you want HA, in that case you will need some redundant hardware.
-abhi
>-----Original Message-----
>From: Jewel Nuruddin [mailto:jewel.nuruddin@yahoo.com]
>Sent: Monday, July 09, 2012 4:27 PM
>To: cloudstack-dev@incubator.apache.org; cloudstack-
>users@incubator.apache.org
>Cc: cloudstack-users@incubator.apache.org
>Subject: About server hardware
>
>Hi All,
>
>Need one comments about server hardware.
>In one hypervisor I want to run 8 guest vm, what will be the main hardware I
>have to take care properly!
>can any one have any thought?
>
>Thanks
>Jewel
RE: About server hardware
Posted by Abhinandan Prateek <Ab...@citrix.com>.
Hi Jewel,
If you list down the requirements for the guest VM in terms of CPU, RAM and storage adding that to Xenserver overhead you can get the requirements for the hardware you need.
For Xenserver overhead, simple rule of thumb is to allow 512 MB for the XenServer total (Hypervisor plus the control domain) if there is less than 5 GB of memory in the server, and allow 1 GB of memory if there is more than 5 GB in the server.
Also you need to decide if you want HA, in that case you will need some redundant hardware.
-abhi
>-----Original Message-----
>From: Jewel Nuruddin [mailto:jewel.nuruddin@yahoo.com]
>Sent: Monday, July 09, 2012 4:27 PM
>To: cloudstack-dev@incubator.apache.org; cloudstack-
>users@incubator.apache.org
>Cc: cloudstack-users@incubator.apache.org
>Subject: About server hardware
>
>Hi All,
>
>Need one comments about server hardware.
>In one hypervisor I want to run 8 guest vm, what will be the main hardware I
>have to take care properly!
>can any one have any thought?
>
>Thanks
>Jewel