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Poor performance OCFS2 over EXT4

2808222Aug 25 2015 — edited Aug 28 2015

Hi,

I am not a DBA. I'm working one storage and OS. I currently testing "OCFS2" Oracle Linux 7.1. I have a test database on a LUN (with FC protocol). I play with a script to read and write queries. Performance is often better when the LUN is formatted EXT4.

(clean cache = "free && sync && echo 3 > /proc/sys/vm/drop_caches && free" before test)

OCFS2 has been formatted with these parameters "mkfs.ocfs2 -T datafiles". I tried several settings but performance is still below EXT4 (formatting by default).

I use unbreakable kernel : 3.8.13-98.1.2.el7uek.x86_64.

I mount OCFS2 lun with "_netdev,noatime,nointr" options ("datavolume" option strongly decreased performance).

Is it normal EXT4 offers better performance than OCFS2 ? Is there other parameters that can increase performance OCFS2?

Thank for your help.

This post has been answered by Avi Miller-Oracle on Aug 25 2015

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#linux, #oracle-linux

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