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From: Richard Davies <richard.davies@elastichosts.com>
To: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>, kwolf@redhat.com
Cc: qemu-devel@nongnu.org, stefanha@linux.vnet.ibm.com
Subject: Re: [Qemu-devel] [PATCH v9 0/4] The intro of QEMU block I/O throttling
Date: Sun, 30 Oct 2011 10:44:22 +0000	[thread overview]
Message-ID: <20111030104422.GD32746@alpha.arachsys.com> (raw)
In-Reply-To: <1319796143-9061-1-git-send-email-wuzhy@linux.vnet.ibm.com>

Hi,

I've been following the evolution of this patch with great interest for use
in our qemu-kvm based IaaS public cloud.

I am not a qemu developer, but have watched this patch go through many
rounds of review and we are very much hoping that it makes it into QEMU 1.0.

In a multi-customer multi-VM public cloud environment, disk i/o limiting is
absolutely key, and qemu itself is a much better place to do it than with a
mix of cgroups and other technologies for each different storage backend.
I understand that it is also more efficient:

  http://www.linux-kvm.org/wiki/images/7/72/2011-forum-keep-a-limit-on-it-io-throttling-in-qemu.pdf

As I say, I am not a qemu developer, so cannot practically help, but wanted
to post to emphasize the importance of this technology as a consumer of qemu.

Best regards,

Richard.

  parent reply	other threads:[~2011-10-30 10:44 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-28 10:02 [Qemu-devel] [PATCH v9 0/4] The intro of QEMU block I/O throttling Zhi Yong Wu
2011-10-28 10:02 ` [Qemu-devel] [PATCH v9 1/4] block: add the block queue support Zhi Yong Wu
2011-10-31 13:35   ` Stefan Hajnoczi
2011-11-01  7:50     ` Zhi Yong Wu
2011-10-28 10:02 ` [Qemu-devel] [PATCH v9 2/4] block: add the command line support Zhi Yong Wu
2011-10-28 10:02 ` [Qemu-devel] [PATCH v9 3/4] block: add the block throttling algorithm Zhi Yong Wu
2011-10-28 10:02 ` [Qemu-devel] [PATCH v9 4/4] qmp/hmp: add block_set_io_throttle Zhi Yong Wu
2011-10-30 10:44 ` Richard Davies [this message]
2011-10-31  2:20   ` [Qemu-devel] [PATCH v9 0/4] The intro of QEMU block I/O throttling Zhi Yong Wu

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