Had a technical architecture document recently from an external supplier proposing a mirrored SQL Server 2005 setup with the Principal as a MSCS. Noticed in the Technet docs that:
"... you may consider using database mirroring as a method for creating a hot standby for a cluster instance database. If you do, be forewarned that because a cluster failover is longer than the timeout value on database mirroring, a High Availability mode mirroring session will react to a cluster failover as a failure of the principal server. It would then put the cluster node into a mirroring state."
Sooooo... this makes the use of a cluster Principal kind of redundant as if it fails over then SQL will move over to the Mirror server. For further info see the Mirroring FAQ.
Tuesday, September 30, 2008
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