[Ocfs2-users] i need some data from linux 2.6 users.

[Arkadiy Kulev]

Hello guys,

I am doing some research here about ocfs2, I suppose it has a very bad
impact on device waiting.

could you please perform the following command and reply with your
output? this request goes out only to linux 2.6 (2.6.18 prefered)
users.

the comand is:

iostat -x

my output of the ocfs2 partition is:

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
sdc              89.30    17.81 54.28  2.24  1146.82   156.96    23.07     0.59   10.44   6.07  34.29

it is a 2-4K block-cluster size (can't remember which one exactly)
ocfs2 partition of a shared iscsi device connected via iscsi hba.

I have many folders and many many subfolders, the structure is like

albums/1/5/7/34157/image.jpg

and as you can see the average utilization is 34%. at peak times it
goes up to 70%.

you might ask how do I know that, since "iostat -x" shows average data
since restart - the answer is simple, I restarted several hours ago
and it is the lowest load of the day time right now.

I need to see your info to check if my clues are correct.

Best regards,
 Arkadiy                          mailto:eth at ethaniel.com