Concurrent io AIX 5.3

Hello all!

I am configuring a new AIX 5.3 machine, for an oracle database 9.2.0.8

The file systems are JFS2, with the blocksize of 4K which matches our db block size.

I would like to implement Concurrent io. I am looking for some advice/affirmation, beyond what I found on Metalink and IBM whitepapers.

What I would like to do is:
1) All datafiles (tables, indexes, UNDO tablespace, etc) would be on JFS2 mounted with cio, with a block size of 4K

2) Redo logs would be on JFS2, mounted with cio, with block size of (agblksize) of 512 BYTES. (is this because oracle writes redos in 512 byte pieces?)

3) Control files would be on on JFS2 file systems, mounted as default (not using direct io or concurrent io).

Does this makes sense? I am assuming that control files should not be on filesystems with cio, though I found some conflicted data about control files.

I would appreciate any advice/affirmations/flames!

Thank you!
-brian s
analyst/dba

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