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	Author	Topic: JFS2 using CIO (Read 1751 times)
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aixeng28

Registered

Posts: 1

Re: JFS2 using CIO

« Reply #3 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


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nath

Jr. Member

Posts: 8

Re: JFS2 using CIO

« Reply #2 on: November 19, 2006, 02:02:35 PM »

Thanks for your response!!

We are using ORACLE RAC 10GR1/Veritas CFS/AIX 5.3ML04.

-Nath


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Mark Taylor

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Posts: 1

Re: JFS2 using CIO

« Reply #1 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


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nath

Jr. Member

Posts: 8

JFS2 using CIO

« 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]