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



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 ?


Hello,

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 them?

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


Best Regards
Maciej Bogucki


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