Re: Why "Separating Data and Indexes improves performance" is a myth?

From: Paul Drake <discgolfdba_at_yahoo.com>
Date: Fri, 23 Apr 2004 18:15:07 -0700 (PDT)
Message-ID: <20040424011507.43963.qmail@web20414.mail.yahoo.com>

• Jared.Still_at_radisys.com wrote:
  > What matters is the performance of your system under
  > load. If you have 10
  > disks in
  > a RAID 0 with all indexes and data residing on it
  > and the performance is
  > somewhat
  > lackluster, splitting those disks into two 5 disk
  > RAID 0 drives and
  > physically separating
  > the indexes and data will not improve performance.
  >
  

OOH - odd number of disks for RAID 0 >> BRAIN HURTS.

These days, I can only do math in my head in powers of 2.

2 advil plus a dose of the paper at hotsos on "Aligning Oracle Blocks with Hardware Stripe Boundaries".

RAID 1 ( 2 )
RAID 10 ( 4, 8)
RAID 0 ( 1, 2, 4, 8 ) Far better to use that odd number for a hotspare (although a hot spare for RAID 0 is not really worthwhile).

RAID F ... sorry, can't do it.

Pd                          

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Received on Fri Apr 23 2004 - 20:12:07 CDT