[Linux-cluster] High availability xen cluster
sasmaz at itu.edu.tr
Tue May 13 08:43:48 UTC 2008
I would like to implement automatic failover. Is there any way to do with using cluster suite and redhat ap 5.1?
From: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Maciej Bogucki
Sent: Wednesday, March 19, 2008 2:15 PM
To: public at van-schelve.de; linux clustering
Subject: Re: [Linux-cluster] High availability xen cluster
> There are three disks in each data centre. Currently I only use the disks
> in rza.
> At the moment I'm testing with a two node cluster. The virtual machines are
> on SAN disks and I can live migrate from one node to the other one. But
> what I have to cover is the disaster. What happens when the fabric in rza
> crashes? My virtual maschines are unavailable. What I'm thinking about is a
> hardware based
> mirroring between the both fabrics and break up the mirror when the
> disaster happens or we need to power off the storage for maintenance. But
> my problem is that I see duplicate pv id's in this situation. I cannot
> mirror based on lvm because it is too slow.
Do You want do implement automatic failover or manual?
You need hardware based mirroring - I'm sure that Hitachi support it(but
it cost come $ for license). The second choice is DRBD with fe. iSCSI
or GNBD, but You have SAN which is better.
If You need automatic failover, You have to set device-mapper-multipath
with Active/Standby configuration where Active is Your rza and Standby
Your secondary rzb. In this case You have to set also synchronous
replication both side.
 - http://www.drbd.org/
Linux-cluster mailing list
Linux-cluster at redhat.com
More information about the Linux-cluster