2550 and 660F problems

Arjan van de Ven arjanv at redhat.com
Wed Mar 6 06:41:01 CST 2002


Henrik Beckman wrote:
 
> 2)Performance from the array is not good enough.
> Array is 13x73 raid5 on a qlogic 2200.

With 7x18 raid0 I easilly get 90Mb bandwidth (FC so 100Mb is the
theoretical limit)
but that's ext2. ext3 will get a slightly lower bandwidth in the default
configuration
due to the way it tries to guarantee data consistency. If I switch ext3
to metadata only mode
(like reiserfs and XFS) I get similar performance to ext2.




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