And what do you suggest?
"Matthew Zito"
<mzito To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
@gridapp.com> cc:
Sent by: Subject: RE: BAARF
ml-errors
09/25/2003 02:29
PM
Please respond
to ORACLE-L
I would strongly advise against redo logs on RAID-0 with oracle duplexing.
Different operating systems respond more or less gracefully to the
vanishing
of a storage device (which is the normal behavior of a failed disk on a
RAID-0 set on a HW array). There's too many variables possible to list out
the scenarios, but I would definitely definitely test failing a RAID-0 set
under load before I would go live with redo logs on raid-0.
Thanks,
Matt
--
Matthew Zito
GridApp Systems
Email: [EMAIL PROTECTED]
Cell: 646-220-3551
Phone: 212-358-8211 x 359
http://www.gridapp.com
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Thomas Day
> Sent: Thursday, September 25, 2003 2:05 PM
> To: Multiple recipients of list ORACLE-L
> Subject: BAARF
>
>
>
> I would love to have a definitive site that I could send all
> RAID-F advocates to where it would be laid out clearly,
> unambiguously, and definitively what storage types should be
> used for what purpose.
>
> Redo logs on RAID 0 with Oracle duplexing (y/n)?
> Rollback (or undo) ditto?
> Write intensive tablespaces on RAID 1+0 (or should that be
> 0+1)? Read intensive tablespaces on RAID ? (I guess 5 is OK
> since it's cheaper than 1+0 and you won't have the write penalty)
>
> While we're at it could we blow up the OFA myth? Since
> you're tablespaces are on datafiles that are on logical
> volumns that are on physical devices which may contain one or
> many actual disks, does it really make sense to worry (from a
> performance standpoint) about separating tables and indexes
> into different tablespaces?
>
> We have killed the "everything in one extent" myth haven't
> we? Everybody's comfortable with tables that have 100's of extents?
>
> And while we're at it, could we include the Oracle 9 multiple
> blocksizes and how to use them. The best that I've seen is
> indexes in big blocks, tables in small blocks --- uh, oh,
> time to separate tables and indexes.
>
> Maybe we will never get rid of the OFA myth.
>
> Just venting.
>
> Tired of arguing in front of management with Oracle certified
> DBAs that RAID 5 is not good, OFA is unnecessary, and uniform
> extents is the only way to go. Looking for a big stick to
> catch their attention with.
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Thomas Day
> INET: [EMAIL PROTECTED]
>
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