Re: ASM normal redundancy vs external redundancy

  • From: Jim Smith <jim@xxxxxxxxxxxxxxxxxxx>
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Tue, 13 Feb 2007 12:49:43 +0000

In message <97b7fd2f0702130014k12db6b34nd9d4f18e84f8478f@xxxxxxxxxxxxxx>, Syed Jaffar Hussain <sjaffarhussain@xxxxxxxxx> writes 

Hello List,
 
When we test ASM with normal redudancy vs external redundancy on AIX,
we got different result of performance.
 
Queries on tables which reside on the tablespace that is placed with
external redudancy ASM disk were giving faster result than tables which
reside with tablespace placed with ASM normal redundancy.
 
Does any one has similar expreience?
 
Which redundancy type works for a highly OLTP database?
 
Given that ASM is relatively new, it is likely that software RAID from a more mature product and hardware RAID both perform better than ASM redundancy for equivalent RAID levels. 
--
Jim Smith
Ponder Stibbons Limited
251 Barcombe Avenue
London SW2 3BH

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