[Ocfs2-users] Slow OCFS2 file creation / how to make ocfs2 generally faster?

[Sunil Mushran]

On 08/21/2011 11:36 PM, Stefan Priebe - Profihost AG wrote:
> Hi Guys,
>
> all in all ocfs2 is a nice piece of software and works very well. Last
> week i made some benchmarks and was thinking if there is a way to make
> it faster.
>
> Here are some results perhaps someone can comment them:
>
> XFS iSCSI target:
> 100MB/s block write
>    50MB/s block rewrite
> 140MB/s block read
>
> OCFS2 iSCSI target (one node connected / two nodes connected)
>    75MB/s block write
>    24MB/s block rewrite
>    82MB/s block read
>
>
> File Creation / Deletion:
>
> XFS iSCSI target:
> 5800 files/s Seq. create
> 5700 files/s Seq. delete
> 5800 files/s Rand. create
> 1300 files/s Rand. delete
>
> OCFS2 iSCSI target (only ONE node connected):
> 5000 files/s Seq. create
> 5400 files/s Seq. delete
> 5300 files/s Rand. create
>    480 files/s Rand. delete
>
> OCFS2 iSCSI target (two or more nodes connected):
>    800 files/s Seq. create
> 5800 files/s Seq. delete
>    800 files/s Rand. create
>    480 files/s Rand. delete
>
> I would be very happy if someone can tell me if this is normal or if
> there are ways to speed this up.
>
> All tests were made using vanilla 2.6.38.8 kernel and these mount
> options noatime,data=writeback,commit=60.

What features do you have enabled on disk?
debugfs.ocfs2 -R "stats" /dev/sdX

Network latency:
cat /sys/kernel/debug/o2net/stats

Number of locks, etc:
cat /sys/kernel/debug/o2dlm/DOMAIN/dlm_state