Re: Redo log & RAID

Okay, I've read all the others so I'll throw in my 2 bits. Here we use a combination of oracle mirroring and hw mirroring. The HW is done by and EMC 8730 frame so it handles the M1-M2 stuff, and it does diags against the disks, calling EMC if either disk starts having problems. Also if one or the other has an issue it takes it off line and only uses the good disk until the bad one is replaced. We also mirror at the oracle level and to make things fast we stripe at the OS level across 4 disks. Oh, yeah, we only use raw devices. Is this overkill, possible, do I sleep better, definately. Is there a performance hit, don't think so, I see no wait events indicating performance issues.

Thom Crider
Senior DBA

Roger Menhennett wrote:

> Oracle mirrors its redo logs with multiple members per redo log group,
> advisedly
> with each member on a separate disk. Question: is HW or SW mirroring a
> better alternative to Oracle's mirroring of these files?
Received on Thu Apr 05 2001 - 08:43:28 CDT