Re: [Xen-users] cluster filesystems

[Brock Edward Palen <brockp@xxxxxxxxx>]

Peter Fokkinga wrote:
> Quoting Brock Edward Palen <brockp@xxxxxxxxx>:
> > The ocfs2 website says that ocfs2 was pushed into the main line 2.6.16
> > did this happen?  and if so has anyone tried kernel.org ocfs2 with
> > xen? This would make my upgrade to 3 much faster :)
> I'm running Xen 3.0.2 using the 2.6.16 kernel on Ubuntu Dapper
> (the upcoming release). Using a shared ocfs2 volume in multiple
> domU's seem to work fine, although I have not extensively tested
> (performance?) it yet.
Ive just been reading on ocfs2 and a lwn article
http://lwn.net/Articles/137278/
and makes the comment that its ment to be used: "s meant to operate with 
a disk which is, itself, shared across the cluster (perhaps via some 
sort of storage-area network or multipath scheme)."
So this requires some sort of NAS unit?  or does it work like PVFS2 ware 
each machine has its own local disk holding only a portion of the data?  
Like a global raid ware the hosts are the block devices and not the 
disks directly?
> Xen normally refuses to start a domU with a volume that is already
> in use (mounted) elsewhere, but you can force it with an exclamation
> point. Example:
>  disk = ['phy:/dev/vg1/jetU,hda1,w', 'phy:/dev/vg1/shared,hdb1,w!']
>                                                               ^^^^^
Ex thankyou
> One last thing, I did compile Xen Xen/Linux from source; I don't
> know if the binary distribution includes ocfs2 support.
No problem use gentoo right now, so im doing that anyway.... :-)
> Regards, Peter
>
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