[Linux-cluster] RHCS suited for split-site configurations.

Maciej Bogucki macbogucki at gmail.com
Fri Aug 29 11:01:58 UTC 2008

travellig travellig wrote:
> Hi All,
> The $Subject came about as part of a comparision exercise between the
> best possible solutions for a HA cluster that span across at the very
> least two geographical sites.
> For example, in a two node cluster (Active-Passive):
> Node 1 (N1) located in DataCenter A (DCA) and node 2 (N2) located in
> DataCenter B ( DCB). The distance between DCA & DCB is < 200 miles.
> The nodes will connect to an DMX800 via 2 HBAs using Brocade-FCSwitches in DCA
> N1 runs all the services while N2 is the back-up.
> Is the $Subject supported by RH ?

If You want to use migration of Resources(Apache,MySQL, ...) if You 
primary DC is down, then RHCS is good option. You need two reliable 
interconnections betwean DCA and DSB, to avoid split-brain. You could 
also try heartbeat[1] instead od RHCS.
Are you going to use GFS?
Do You have DMX800 SAN in DCB? And what with replication of data between 

[1] - http://www.linux-ha.org/

Best Regards
Maciej Bogucki

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