Re: [Xen-users] nfs mountpoints

["M.A. Williamson" <maw48@xxxxxxxxx>]

Why not just export your LVM-ified COW volume over NFS?

Alternatively: * Russ Ross worked on a COW NFS server: 
http://www.russross.com/CoWNFS.html * You could export the CoW volume 
directly from the server using enbd. You could import this at the 
destination dom0 and export it to the guest as a VBD - the guest wouldn't 
know about the network, or the COW. The block-enbd scripts in the unstable 
tree automate the network device binding and exporting to the guest: they 
should "just work" without manual setup (including during migrate).
Cheers,
Mark

On Nov 15 2005, Stephan Seitz wrote:

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> hi there!
>
> i'm currently building a clustered environment of dom0 for domU's
> possible to migrate
> between them.
> by now, the domU's rootfs is mounted via nfs from one single nfsd w/
> reiser4 in the net.
> this works nice, but a COW-fs would do it better :) . i found very
> rare infos about this
> parallax fs integration in xen, but this seems to be under heavy
> development and not
> going to get productive right now?
> another solution with COW support, that works LOCALLY was a lvm setup
> (well only one
> vg over one pv) with the rootfs as real lv. the VM's rootfs has been
> done via "lvmcreate -s"
> as snapshot. Well, as said, this did it LOCALLY and -except of some
> unremovable snapshots-
> worked also very well.
> I'm searching for a solution with networktransparent COW support. I've
> only found the gfs
> via gndb / ccs from the RedHat Clustersite. This looks interresting,
> but i think this thingy
> will lead me to some headaches :)
> Does someone here do know a netwide mountable COW fs? Or, maybe some
> better idea of
> solving/performing this issue?
>
> Thanks in advance
>
> Stephan Seitz
>
>
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