[Xen-users] Best way to store domU's. NFS? NBD?

[Wiebe Cazemier <halfgaar@xxxxxxx>]

Hi,

I'm trying to find out what the way is to store the domU disk images, keeping
live migration and failover in mind. One source [1] says NFS is the most
common. Another source [2] says that NFS is flaky. Then iSCSI is mentioned as
very robust, but the xen wiki makes not a single mention of that. Also, (E)NBD
is mentioned.

I want to setup a cluster where I have a machine for storing the disk images
and then a bunch of machines between which I want to freely migrate my domU's
back and forth. The machine storing the images itself should also run domU's,
if possible. This is not possible with NBD, according to [2].

What is important, is that the storage server has failover. I could do this
with drbd (distributed remote block device) and NFS, but I have no idea what
would be the best way. 

Any help is appreciated.

[1]
http://www.virtuatopia.com/index.php/Migrating_Xen_domainU_Guests_Between_Host_Systems
[2] http://lists.xensource.com/archives/html/xen-users/2007-08/msg00264.html


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