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Posted to users@cloudstack.apache.org by WXR <14...@qq.com> on 2013/07/04 14:26:19 UTC
How many vms per primary storage can offer best performance?
I use NFS share as primary storage,the NFS share is on a 8 SATA HDDs RAID10 volume.
The network link is gigabit ethernet.The switch is dell powerconnect.
When I just create 15-20 vm instances and start them(not run any software on them),I find the disk IO performance of the vm is very low.
If a file copy job on a pc needs 10 minutes , the same job on the vm needs 20minutes.
I don't know if it is normal,and I want to know the correct configuration of the primary storage,I need your suggests with enough experience.
Re: How many vms per primary storage can offer best performance?
Posted by Dean Kamali <de...@gmail.com>.
Well can you tell us more about your setup, before blaming NFS for being
slow :)
In most cases the hardware is what to blame, Are you using 6Gbps / SATA3
drives?
Your 1GB link most likely the bottle neck here, you will need to either
bond 4 NICs together or maybe invest in 10G switch.
I'm using NFS with SSDs and SATA3 drives / with expensive DELL Raid
controller, and 10G Network, I'm able to run 30 - 40 vms with no
performance issues.
On Fri, Jul 5, 2013 at 1:35 AM, Ignazio Cassano <ig...@gmail.com>wrote:
> Hi, I think nfs is not a good solution.
> Try clvm over iscsi or fc.
> Regards
> Il giorno 04/lug/2013 18:26, "Conrad Geiger" <cg...@it1solutions.com> ha
> scritto:
>
> > I would also say that 8 spindles for 15-20 VMs is low. You are going to
> > run out of iops.
> >
> >
> > Sent from my Verizon Wireless 4G LTE Smartphone
> >
> >
> >
> > -------- Original message --------
> > From: Ahmad Emneina <ae...@gmail.com>
> > Date: 07/04/2013 9:10 AM (GMT-05:00)
> > To: Cloudstack users mailing list <us...@cloudstack.apache.org>
> > Subject: Re: How many vms per primary storage can offer best performance?
> >
> >
> > I would google NFS tuning and atomically test changes. Changes vary from
> > the kernel level up through the switches (sizing frames) as well as
> > introducing bonding. YMMV here NFS tuning is a huge part trial and error.
> >
> >
> > On Thu, Jul 4, 2013 at 5:26 AM, WXR <14...@qq.com> wrote:
> >
> > > I use NFS share as primary storage,the NFS share is on a 8 SATA HDDs
> > > RAID10 volume.
> > > The network link is gigabit ethernet.The switch is dell powerconnect.
> > >
> > > When I just create 15-20 vm instances and start them(not run any
> software
> > > on them),I find the disk IO performance of the vm is very low.
> > > If a file copy job on a pc needs 10 minutes , the same job on the vm
> > needs
> > > 20minutes.
> > >
> > > I don't know if it is normal,and I want to know the correct
> configuration
> > > of the primary storage,I need your suggests with enough experience.
> >
>
Re: How many vms per primary storage can offer best performance?
Posted by Ignazio Cassano <ig...@gmail.com>.
Hi, I think nfs is not a good solution.
Try clvm over iscsi or fc.
Regards
Il giorno 04/lug/2013 18:26, "Conrad Geiger" <cg...@it1solutions.com> ha
scritto:
> I would also say that 8 spindles for 15-20 VMs is low. You are going to
> run out of iops.
>
>
> Sent from my Verizon Wireless 4G LTE Smartphone
>
>
>
> -------- Original message --------
> From: Ahmad Emneina <ae...@gmail.com>
> Date: 07/04/2013 9:10 AM (GMT-05:00)
> To: Cloudstack users mailing list <us...@cloudstack.apache.org>
> Subject: Re: How many vms per primary storage can offer best performance?
>
>
> I would google NFS tuning and atomically test changes. Changes vary from
> the kernel level up through the switches (sizing frames) as well as
> introducing bonding. YMMV here NFS tuning is a huge part trial and error.
>
>
> On Thu, Jul 4, 2013 at 5:26 AM, WXR <14...@qq.com> wrote:
>
> > I use NFS share as primary storage,the NFS share is on a 8 SATA HDDs
> > RAID10 volume.
> > The network link is gigabit ethernet.The switch is dell powerconnect.
> >
> > When I just create 15-20 vm instances and start them(not run any software
> > on them),I find the disk IO performance of the vm is very low.
> > If a file copy job on a pc needs 10 minutes , the same job on the vm
> needs
> > 20minutes.
> >
> > I don't know if it is normal,and I want to know the correct configuration
> > of the primary storage,I need your suggests with enough experience.
>
Re: How many vms per primary storage can offer best performance?
Posted by Conrad Geiger <cg...@it1solutions.com>.
I would also say that 8 spindles for 15-20 VMs is low. You are going to run out of iops.
Sent from my Verizon Wireless 4G LTE Smartphone
-------- Original message --------
From: Ahmad Emneina <ae...@gmail.com>
Date: 07/04/2013 9:10 AM (GMT-05:00)
To: Cloudstack users mailing list <us...@cloudstack.apache.org>
Subject: Re: How many vms per primary storage can offer best performance?
I would google NFS tuning and atomically test changes. Changes vary from
the kernel level up through the switches (sizing frames) as well as
introducing bonding. YMMV here NFS tuning is a huge part trial and error.
On Thu, Jul 4, 2013 at 5:26 AM, WXR <14...@qq.com> wrote:
> I use NFS share as primary storage,the NFS share is on a 8 SATA HDDs
> RAID10 volume.
> The network link is gigabit ethernet.The switch is dell powerconnect.
>
> When I just create 15-20 vm instances and start them(not run any software
> on them),I find the disk IO performance of the vm is very low.
> If a file copy job on a pc needs 10 minutes , the same job on the vm needs
> 20minutes.
>
> I don't know if it is normal,and I want to know the correct configuration
> of the primary storage,I need your suggests with enough experience.
Re: How many vms per primary storage can offer best performance?
Posted by Ahmad Emneina <ae...@gmail.com>.
I would google NFS tuning and atomically test changes. Changes vary from
the kernel level up through the switches (sizing frames) as well as
introducing bonding. YMMV here NFS tuning is a huge part trial and error.
On Thu, Jul 4, 2013 at 5:26 AM, WXR <14...@qq.com> wrote:
> I use NFS share as primary storage,the NFS share is on a 8 SATA HDDs
> RAID10 volume.
> The network link is gigabit ethernet.The switch is dell powerconnect.
>
> When I just create 15-20 vm instances and start them(not run any software
> on them),I find the disk IO performance of the vm is very low.
> If a file copy job on a pc needs 10 minutes , the same job on the vm needs
> 20minutes.
>
> I don't know if it is normal,and I want to know the correct configuration
> of the primary storage,I need your suggests with enough experience.