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Title: JFS2 using CIO Post by: nath on November 16, 2006, 08:22:57 PM I have turned CIO [Concurrent I/O] on my Database JFS2 filessystem using
chfs -a options=cio <JFS2 Filesystem Name> I would like to confirm if the JFS2 filesystem is really set to CIO, how do I check? [I couldn't install lsof on my enviroments] Title: Re: JFS2 using CIO Post by: Mark Taylor on November 17, 2006, 04:37:59 PM remount the filesystem and then run the mount command with no flags and you will see the option in the output. to test if cio is working ok, then time a cp command of a 1MB file then do the same using dd with a 1MB block size .. you will see the dd runs abotut 7 times faster than the cp command.
what db you using ? if db2 then you should turn cio on for the tablespace rather than the mount option as normal operations within the cio mounted filesystem could cuase you a headache .. check the docs etc.. HTH Mark Taylor Title: Re: JFS2 using CIO Post by: nath on November 19, 2006, 02:02:35 PM Thanks for your response!!
We are using ORACLE RAC 10GR1/Veritas CFS/AIX 5.3ML04. -Nath Title: Re: JFS2 using CIO Post by: aixeng28 on December 01, 2006, 03:11:16 PM I believe that an lsfs -q or -a should show you that CIO is enabled.
HTH, Mathew |