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

[Sunil Mushran]

On 08/24/2011 09:56 PM, Stefan Priebe - Profihost AG wrote:
>
> ok here is a new complete test with values before and after and all bonnie details.
>
> File creation and seq. delete drops again massively.
>

Version  1.96       ------Sequential Output------ --Sequential Input- --Random-
Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
server123-han   16G   519  99 113505 22 44504   8  2601  99 97508   6  1241  18   1node
server123-han   16G   441  99 113301 23 45351   6  2641  99 102175  6  1158  16   2node
server123-han   16G  1715  98 117309  6 47932   4  4656  98 141380  7  796.2 24   xfs


Version  1.96       ------Sequential Create------ --------Random Create--------
server123-han       -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files:max            /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
   1024:32768:0/1024  3147  75   437  10  1670  23  3145  76    68   1   197   2     1node
   1024:32768:0/1024   569  39   178   7   866  20   556  39    63   3   183   4     2node
   1024:32768:0/1024  2611  27   873   5  8528  76  2604  27    93   0  3875  51     xfs


Yes, there is a drop in creates. Creates are a bit heavy on cluster locks. There
is scope for improvement at our end.

Read/writes are fairly stable though.

Unfortunately, I've forgotten your original qs.