Re: Sun Cluster + QFS or Sun Cluster + Veritas

Robert Milkowski wrote:
Sanjay <sanjay@xxxxxxxx> wrote:
Is MPXIO comparable to DMP? Are people actually running Sun volume
manager under production Oracle DB's? I've used SVM for mirroring
boot drives on web servers and app servers but never in the database
tier.

I use SVM+SC+Oracle for some years - works perfect.

--
Robert Milkowski
rmilkowskisdvsd@xxxxxxxx
http://milek.blogspot.com

We currently are running two Sun Clusters, one version 3.0 with Oracle
OPS on Solaris 8 and a second with Cluster 3.1 and Oracle RAC on
Solaris 9. Both clusters use Veritas VM for storage management but use
the MPxIO drivers for multipathing.

Veritas used to make the argument that the DMP multipath driver offered
better load balancing. From what I have read on MPxIO (been out of
Solaris world for a while), round-robin is the default (only??) load
balancing model. Truthfully, not sure if it makes much difference in
95% of the cases.

If using OPS/RAC, you need your DBAs to bring down Oracle instances for
node or cluster shutdown. Instance control not included as part of a
package/resource group in this configuration. Just means more
coordination and people involved during restarts.

Installation and maintenance of pkgs/resource groups are a bit more
tedious in SC. You need to balance that against the clusters various
capabilities for diagnosing and handling faults. For instance, in HP
Service Guard, I could probably set up a custom package with storage
and networking in a day. Based on limited experience with Sun Cluster,
it might take two.

The clusters have been solid. No unplanned outages for quite some time.
DBAs and end-users are happy with performance.

.

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