The IO performance drops dramatically as the MPI-IO threads increases over 512. I am not sure where the performance problems lie. I am about to collect the IO requests to each OST to distinguish the problem of MPI-IO and Lustre. But I am not familiar with any Lustre IO monitoring tool. Any suggestions? Thanks in advance. -- Youyou Lu Tsinghua University
Andrew Uselton
2011-Jun-13 17:09 UTC
[Lustre-devel] Any Tools for Lustre IO Request Monitoring
Check out this tool: https://github.com/chaos/lmt/wiki You can see some graphs generated by analyzing that data stream here: http://portal.nersc.gov/project/pma/ There''s a lot more in LMT (and Lustre!) than I have explored, but I''d be happy to discuss what little I do know. Cheers, Andrew On Thu, Jun 9, 2011 at 1:50 AM, Youyou Lu <yoyolu05 at 163.com> wrote:> > > > The IO performance drops dramatically as the MPI-IO threads increases over > 512. I am not sure where the performance problems lie. I am about to collect > the IO requests to each OST to distinguish the problem of MPI-IO and Lustre. > But I am not familiar with any Lustre IO monitoring tool. Any suggestions? > Thanks in advance. > > -- > Youyou Lu > Tsinghua University > > > > _______________________________________________ > Lustre-devel mailing list > Lustre-devel at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-devel >-------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-devel/attachments/20110613/424bfa64/attachment.html