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Re: RAID and Redo Logs

From: <satar_at_my-dejanews.com>
Date: Tue, 06 Oct 1998 17:28:09 GMT
Message-ID: <6vdjv9$6mb$1@nnrp1.dejanews.com>


Ideal situation for redo log groups is to have two seperate disks on two seperate controllers with one member of the redo log group residing on the first disk while the other member of the redo log group residing on the second disk. This is because the redo log files have a high level of I/O. If you place the redo log groups on a RAID configuration, then you will take a performance hit. For example, RAID5...All writes and reads involve a parity caculation.

Regards,
Satar

In article <36170F95.16BD_at_gpu.srv.ualberta.ca>,   Brian Yan <by2_at_gpu.srv.ualberta.ca> wrote:
> I was told by a DBA that the disk where the redo log resides should not
> be configured as RAID. Is it true and why? Thank you in advance!
>
> Brian
>

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