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Re: [Qemu-devel] [RFC PATCH 1/1] ceph/rbd block driver for qemu-kvm

From: Avi Kivity
Subject: Re: [Qemu-devel] [RFC PATCH 1/1] ceph/rbd block driver for qemu-kvm
Date: Sun, 23 May 2010 15:01:59 +0300
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100330 Fedora/3.0.4-1.fc12 Thunderbird/3.0.4

On 05/21/2010 12:29 AM, Anthony Liguori wrote:

I'd be more interested in enabling people to build these types of storage systems without touching qemu.

Both sheepdog and ceph ultimately transmit I/O over a socket to a central daemon, right?

That incurs an extra copy.

So could we not standardize a protocol for this that both sheepdog and ceph could implement?

The protocol already exists, nbd. It doesn't support snapshotting etc. but we could extend it.

But IMO what's needed is a plugin API for the block layer.

error compiling committee.c: too many arguments to function

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