I'm using Red Hat GFS 6.0 as the cluster file system for a 4-node Oracle RAC 9.2.0.7, each node is running RHAS 3 Update 6. There're probably a lot of benefits in using direct I/O and/or async I/O with Oracle9i RAC. RH GFS itself supports direct I/O regardless of the application running on top of it. I have asked a Oracle Support Service guy and he confirms that we can use direct I/O feature of RH GFS but he doest have information about async I/O. May I turn on direct I/O and/or async I/O (I mean recompile Oracle to support async I/O) when using GFS as the cluster file system for Oracle9i RAC? Do you have any experience with this? Please help.
TIA,
Thai Duong.
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