[Lustre-discuss] Setup mail cluster

[Michael Schwartzkopff]

Am Montag, 12. Oktober 2009 15:54:04 schrieb Vadym:
> Hello
> I'm do a schema of mail service so I have only one question:
> Can Lustre provide me full automatic failover solution?

No. See the lustre manual for this. You need a cluster solution for this.
The manual is *hopelessly* outdate at this point. Do NOT user heartbeat any 
more. User pacemaker as the cluster manager. See www.clusterlabs.org.

When I find some time I want to write a HOWTO about setting up a lustre clsuter 
with pacemaker and OpenAIS.

> I plan to use for storage the standard servers with 1GE links. I need
> automatic solution as possible.
> E.g. RAID5 functionality, when one or more storage node down user data
> still accessible. So if I have 100TB of disk storage I can serve 50TB of
> data in failover mode with no downtime. Can you provide me more
> information?

Is a  bond-device for cluster interconnect! It is more safe!

Use DRBD for replication of the data if you use Direct attached Storage.

DRBD can operate on top of LVM. So you can have that functionallity also.

Perhaps you can try clustered LVM. Has nice features.

Or just use ZFS, which offers all this.

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Dr. Michael Schwartzkopff
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