Re: [Xen-users] small cluster storage configuration?

[Miles Fidelman <mfidelman@xxxxxxxxxxxxxxxx>]

Bart Coninckx wrote:
> On 10/10/11 22:53, Bart Coninckx wrote:
>
> Continued reading some more on VastSky. This seems to offer redundancy 
> too, by means of mirroring. 4 nodes might be not enough for that 
> though. Also, I wonder if it is suitable for things like live 
> migration, which iSCSI and AoE can do.
VastSky seems to suffer from two problems:
- storage manager is a single point of failure
- development seems to have stopped in Oct. 2010

GlusterFS also does replication - question is whether it's performance 
is up to supporting VMs.  Mixed responses so far, some suggestions that 
this is supposed to get a lot better in version 3.3 (currently in 
beta).  Not sure the impact of Red Hat's acquisition of Gluster.
Starting to think that one approach would be to publish all 16 drives 
via AoE, then build one big md RAID10 array across them (linux RAID10 is 
interesting vis. standard RAID1+0 - it does mirroring and striping as a 
single operation, which uses disk space more efficiently).  Trying to 
work through how things would respond in the event of node failures (4 
drives go out at once).



--
In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra



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