re Direct IO -- was RE: Important note about asynchronous commit



Oracle should always be opening the files with O_DSYNC.

See http://www.opensolaris.org/jive/thread.jspa?messageID=7037
There's a good point there about the Archiver -- ArchiveLog files
should not be on Direct I/O filesystems.

Hemant

At 10:51 PM Tuesday, Jesse, Rich wrote: 
This thread leads me to a question.  Does the Unix syncer come into play
when direct IO is used?  I believe it does with most FS caching, which
means that even synchronous writes can't really be guaranteed, doesn't
it?  At least that's what I was lead to believe...

Rich
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Hemant K Chitale
Sent: Tuesday, September 26, 2006 9:28 AM
To: juancarlosreyesp@xxxxxxxxx; Oracle-L Freelists
Subject: Re: Important note about asynchronous commit

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Hemant K Chitale
http://web.singnet.com.sg/~hkchital


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