Re: Redo group members needed with hardware mirror???

From: Connor McDonald <connor_mcdonald_at_yahoo.com>
Date: Wed, 05 Jan 2000 21:06:11 +0800
Message-ID: <387341C3.61A@yahoo.com>

Steven Hauser wrote:
>
> What reason would you multiplex the redo log if you had
> hardware mirrors of the disks?
>
> The only reason given in the manuals is if a redo file is
> lost due to disk failure.
>
> Hardware mirrors seem more reliable than additional Oracle
> mirroring 'multiplexing' and maybe faster without
> oracle mirroring.
>
> --
> ---------------------------------------------------------
> Steven Hauser
> email: hause011@tc.umn.edu URL: http://www.tc.umn.edu/~hause011
> ---------------------------------------------------------

Hardware mirroring does not protect you from redo-log corruption - thus if one gets corrupted, both copies do, whereas the likelihood of this is lessened when using the Oracle multiplexing.

On the other hand, the hardware mirroring (or even OS software level) will probably be faster.
--

---

Connor McDonald
"These views mine, no-one elses etc etc" connor_mcdonald_at_yahoo.com

"Some days you're the pigeon, and some days you're the statue." Received on Wed Jan 05 2000 - 07:06:11 CST