[Linux-cluster] redhat cluster in multi SAN

[Mikko Partio]

2008/4/25 gnia gnia <gniagnia at gmail.com>:

> sorry my first message was a bit vague.
> We have 2 HP EVA arrays : one being the backup device of the other in case
> a crash occurs.
> So we make each node of the cluster (active/passive , multipath + clvmd +
> cmirror) connected to both EVAs.
> We create one disk on each EVAs with same characteristics, plus one disk
> on one of the 2 EVAs as a log mirror disk.
> Then we 'lvcreate -m1 disk1 disk2 disk3' and put our file system resource
> on this lv.
> That is where our test (shutdown of an EVA) totally fails.
> Unfortunately ha-lvm won't be usable because we intend to use GFS soon.
> What we need is a solution that ensures clusterized services to carry on
> working even if on EVA burns...



AFAIK there is no open source software to make this happen. I've read about
cmirror which could replicate data between two sans in a clustered
environment but it was not production-proof last time I heard of it...

We have a similar situation, two different sans one being a backup, and we
use the san providers (EMC) proprietary replication software.

Regards

Mikko
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