Re: Raid performace issues (Raid 5 vs. Raid 0+1) with database files

From: <bchorng_at_my-deja.com>
Date: Wed, 01 Sep 1999 23:58:14 GMT
Message-ID: <7qkeig$eaq$1@nnrp1.deja.com>

I have only one comment regarding Doug's statement below on mirroring and multiplexing redos.

Mirroring redo and multiplexing redo log members are 2 different things. We had a real life experience that a DBA mistakenly removed all redo logs while system is running. In this case mirror would not help a bit.

But another member would have saved our butts - sort like you have multiple controlfiles.

Mirror also mirrors human mistakes, but multi-members won't.

So we do both since then.

-Bass Chorng

> Also
> - If you are mirroring, there is really no reason for multiple redo log
> members in the groups.
> - But archive redo on fast drives.
>
> Good Luck
>
> Doug Coan
> Senior Client Server Systems Integrator
> Aegon USA
>
> Sent via Deja.com http://www.deja.com/
> Share what you know. Learn what you don't.
>

Sent via Deja.com http://www.deja.com/
Share what you know. Learn what you don't. Received on Wed Sep 01 1999 - 18:58:14 CDT