Re: active-pasive cluster in linux
- From: przemolicc@xxxxxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Tue, 23 Feb 2010 17:49:30 +0100
On Tue, Feb 23, 2010 at 09:47:54AM -0600, John Thompson wrote:
> We've got mostly 2 node (but also have a 6 and 4 node) clusters setup using
> CRS. Oracle binaries on OCFS2. Storage on ASM. Multiple database in
> active/passive mode on each cluster. This is all on Redhat Linux on
> commodity hardware. Prior to that, we were on Solaris using Veritas file
> systems. If a database crashed in the Solaris/Veritas environment, it would
> take 45 mins for that server to reboot and mount all the file systems for
> all the databases. With out current environment, there's no need to
> mount/fschk file systems upon reboot so our failover time is usually less
> than 5 mins. We also reduced the number of licenses needed by going from
> the Solaris full license price to the 1/4 priced AMD's. Uptime has also
> increased dramatically as the Sun 2900's and 6800's were not as fault
> tolerant as advertised.
VxFS is journaled filesystem and in case of unplanned reboot it takes
really a few seconds (up to 5-10 - depends on filesystem size) to check
its consistency.
There is (usually) no need to run fsck on VxFS.
Regards
Przemyslaw Bak (przemol)
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http://przemol.blogspot.com/
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