aio on sun ufs problem
- From: "zhu chao" <chao_ping@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 4 May 2004 17:59:45 +0800
Hi friends:
While reading the following paper:
http://de.sun.com/Partner/Softwarepartner/Oracle/Technik/pdf/oracle_on_sun.pdf
It says for oracle 8.1.7/ufs, aio is by default disabled. We must enable it
explictly with _filesystemio_options=asynch. Is it true? For aio on raw
device/QuickIO, we can see truss -t kaio -p dbwr to verify it, for aio on
filesystem, how to verify it then?
And other question about solaris, that doc also says, with solaris 8 update
3, there is concurrent directIO for ufs. Is it a feature of ufs, or a feature
of solaris kernel? If it is a ufs feature, then even with solaris 8 update 3, I
cannot use this feature on vxfs/solaris8 update 3.If it is a feature of solaris
kernel, I think CDIO is also ok on vxfs, is it true?
And how can I know whether my solaris 8 is using update 3+ via command line
like compare the kernel version (uname -a)?
Thanks.
zhu chao.
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