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Multiplex Redo Logs with Mirrored Disks?

From: David Wagoner <dwagoner_at_arsenaldigital.com>
Date: Tue, 23 Nov 2004 10:46:51 -0500
Message-ID: <C6F17AC15C94D84EBEB96A7B7D59D80605B39787@MONALISA.arsenaldigital.com>


Is there any need to multiplex redo logs with mirrored disks (e.g., RAID-1 or RAID-1+0)?
Example- Oracle recommends multiplexing redo logs on separate disks, like redo01a.log on Disk1 and redo01b.log on Disk2, etc.

However, now that mirrored disks are in common use with RAID-1+0, RAID-1, etc. it seems that sufficient protection is in place to use only a single copy of each redo log. This would also provide the benefit of reduced disk I/O to write redo information to disk.

Anyone disagree?

Best regards,

David B. Wagoner
Database Administrator

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Received on Tue Nov 23 2004 - 10:39:35 CST

Original text of this message

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