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xen-devel
Re: [Xen-devel] organizing virtual machines
> There are really two other solutions that I know of. Either some sort
> of content-addressable storage based file system (like Plan9's Venti)
> which would provide an optimum storage scenario (although at a
> performance/complexity cost) or some sort of Copy-On-Write filesystem or
> block device.
Someone in Cambridge was working on a CoW NFS server at one stage. I'm not
sure what happened to it (although in any case, you wouldn't want it for IO
intensive filesystems).
> LVM snapshots has been suggested a COW mechanism.
I think LVM snapshots have proved not to be as well suited as people would
like.
I'm currently working on a shared-memory based filesystem for Xen virtual
machines. It should (eventually) give very decent IO performance. At some
stage, it would be nice to add filesystem-level functionality too.
Cheers,
Mark
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