[Ocfs2-users] slow large file copying NFS

[Hideyasu Kojima]

Hi everyone,

I using OCFS2 as NFS Server.

When a large file(10GB) copy is performed simultaneously ,
performance deteriorates remarkably.

For example, when the NFS client of machine1 and machine2 exists, the
file of 10 GB of each of test1, test2, and test3 is created to /work by
which the NFS share was carried out.
The following two commands are simultaneously executed in this state
machine1,

cp /work/test1 /work/test1-2
cp /work/test2 /work/test2-2

 in machine2, the following command is executed further.

cp /work/test3 /work/test3-3

OCFS2 Although 1.4.7 has taken about the time which the copy of test3
takes about 10 minutes from 5, it may require for the copy of test1 and
test2 which is carrying out simultaneous execution by machine1 40
minutes or more.

Moreover, kernel-2.6.32-100.0.19.el5 is used and it is OCFS2 1.6.3 is
used, it is improved a little and the copy of test1 and test2 is ended
in 20 to 25 minutes.

however -- the case where XFS and ext3 are used -- test1, test2, and
test3 -- it ends within 10 minutes, respectively.

Is there any method of something improving?