Re: Multiplex Redo Logs with Mirrored Disks?
- From: "Terry Sutton" <terrysutton@xxxxxxx>
- To: "ORACLE-L (E-mail)" <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 23 Nov 2004 13:08:09 -0800
It depends on what you call "need". Remember that there can be issues other
than losing a drive. Have you ever accidentally done a "rm *" in the wrong
directory?
--Terry
----- Original Message -----
From: "David Wagoner" <dwagoner@xxxxxxxxxxxxxxxxxx>
To: "ORACLE-L (E-mail)" <oracle-l@xxxxxxxxxxxxx>
Sent: Tuesday, November 23, 2004 7:46 AM
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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