RE: Multiplex Redo Logs with Mirrored Disks?
- From: <Paula_Stankus@xxxxxxxxxxxxxxx>
- To: <dwagoner@xxxxxxxxxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 23 Nov 2004 12:16:56 -0500
I disagree -=20
-multiplexing provides you protection against user error that mirroring
doesn't.=20
-Also, I have experienced bugs with mirroring hardware/software that
caused the mirror to corrupt data
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of David Wagoner
Sent: Tuesday, November 23, 2004 10:47 AM
To: ORACLE-L (E-mail)
Subject: Multiplex Redo Logs with Mirrored Disks?
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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