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Re: [Qemu-devel] [RFC PATCH 0/2] GlusterFS support in QEMU - v2

From: Bharata B Rao
Subject: Re: [Qemu-devel] [RFC PATCH 0/2] GlusterFS support in QEMU - v2
Date: Sat, 21 Jul 2012 18:34:46 +0530
User-agent: Mutt/1.5.21 (2010-09-15)

On Sat, Jul 21, 2012 at 05:52:59PM +0530, Vijay Bellur wrote:
> On 07/21/2012 01:59 PM, Bharata B Rao wrote:
> >We now
> >specify the gluster backed image like this:
> >
> >-drive file=gluster:address@hidden:volname:image
> >
> >- Here 'gluster' is the protocol.
> >- 'address@hidden' specifies the server where the volume file specification 
> >for
> >   the given volume resides. 'port' is the port number on which gluster
> >   management daemon (glusterd) is listening. This is optional and if not
> >   specified, QEMU will send 0 which will make libgfapi to use the default
> >   port.
> >- 'volname' is the name of the gluster volume which contains the VM image.
> >- 'image' is the path to the actual VM image in the gluster volume.
> >
> >Note that we are no longer using volfiles directly and use volume names
> >instead. For this to work, gluster management daemon (glusterd) needs to
> >be running on the QEMU node.
> glusterd needs to be running on the server that is specified in
> 'address@hidden' option.

oh yes, thanks.

> >Scenarios
> >---------
> >Base: QEMU boots from directly from image on gluster brick.
> >Fuse mount: QEMU boots from VM image on gluster FUSE mount.
> >Fuse bypass: QEMU uses gluster protocol and uses standard client volfile.
> >Fuse bypass custom: QEMU uses gluster protocol and uses a minimal client
> >     volfile that just has client xlator.
> >RPC bypass: QEMU uses just posix xlator and doesn't depend on gluster server.
> >
> For the Fuse mount, Fuse bypass and Fuse bypass custom scenarios, I
> assume a single local gluster brick is being used. Is this correct?

Right, fio numbers are for single local gluster brick scenario.


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