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Vol. 3 No. 10 December 2004

Faster DB failover in view

Keeping a database running at all costs can be painful. Traditional approaches to database high availability (HA), such as running Veritas Cluster Server or Microsoft Cluster Server, require IT managers to double their administrative duties, and then some. "Everything you do to the primary server, you have to do to the secondary server," says Steve Norall, director of marketing at PolyServe, Beaverton, OR, maker of the PolyServe Matrix Server clustered file system for Linux and Windows. Traditional HA approaches can also take a long time to get a secondary server online. A failure first needs to be detected and then the secondary server has to claim the disk through a SCSI reserve/release command; then it must check and restore the file system, mount the file system and, finally, load Oracle. This can easily take 20 to 30 minutes. "It's by no means instantaneous," Norall says. PolyServe's solution to the database HA problem relies, not surprisingly, on its clustered file system software. It works like this: Run Matrix Server on ...

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Columns in this issue