From: Nikola Ciprich <extmaillist@linuxbox.cz>
To: T Johnson <tjohnson46@gmail.com>
Cc: kvm@vger.kernel.org, nikola.ciprich@linuxbox.cz
Subject: Re: limiting guest block i/o for qos
Date: Thu, 25 Nov 2010 09:33:18 +0100 [thread overview]
Message-ID: <20101125083318.GA2398@nik-comp.lan> (raw)
In-Reply-To: <AANLkTi=FdV6KOeL2D9r-at3yR1AfajSDC78ao5aOOuzV@mail.gmail.com>
Hello Thomas,
I t hink blkio-cgroup really can't help You here, but since NFS is
network protocol,
why not just consider some kind of network shaping?
n.
On Thu, Nov 25, 2010 at 12:58:22AM -0500, T Johnson wrote:
> Hello,
>
> Does anyone know of any work in progress or any tricks to limit a
> guest's i/o requests to a specific throttled rate? I have guests that
> mount their filesystems via virtio, which are images served on an NFS
> server. Some of these guests will flood the server with requests and
> can then choke out the i/o requests of neighboring guests. I'd rather
> be able to specify that certain guests can only get so many read or
> write iops. i/o bandwidth rates would be nice, but iops tend to be the
> killer since an nfs server only has so many.
>
> I've seen something recently on a block i/o throttling via cgroups,
> but from what I've been able to grok... this support is being built
> only with local devices in mind? I'm afraid that wouldn't work for my
> NFS server setup and image files?
>
> Is there something that can be done from with virtio? Or another trick?
>
> Thanks,
> Thomas
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next prev parent reply other threads:[~2010-11-25 8:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-25 5:58 limiting guest block i/o for qos T Johnson
2010-11-25 8:33 ` Nikola Ciprich [this message]
2010-11-29 2:00 ` T Johnson
2010-11-29 9:58 ` Stefan Hajnoczi
2010-11-30 0:57 ` T Johnson
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