RE: The ill effects of NOT using direct I/O

From: Allen, Brandon <Brandon.Allen_at_OneNeck.com>
Date: Tue, 15 Feb 2011 09:19:01 -0700
Message-ID: <64BAF54438380142A0BF94A23224A31E11FB40ACD6_at_ONEWS06.oneneck.corp>

I didn't see any error in the doc - it says that filesystemio_options=setall enables CIO for jfs2 and DIO for jfs:

"This enables Concurrent I/O on JFS2 and Direct I/O on JFS for all data file I/O"

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Nuno Souto

>
> http://download.oracle.com/docs/cd/B19306_01/server.102/b15658/appa_aix.htm#i631245
>

This must be a doco error. JFS does not support cio. As that same link shows in the "File System IO Options", Concurrent IO does not work for jfs: it is exclusive to jfs2. That detail should not be forgotten.

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Received on Tue Feb 15 2011 - 10:19:01 CST