Please don't reply to lustre-devel. Instead, comment in Bugzilla by using the following link: https://bugzilla.lustre.org/show_bug.cgi?id=11268
WIDE STRIPING STATUS, 2007-01-31 ~~~~~~~~~~~~~~~~~~~~ GENERAL STATUS AND NOTES: The latest versions of all spreadsheets have been sent to lustre-discuss. These (hopefully) contain enough information to reproduce the results. In future, it should be possible to use plot-sgpdd to plot results instead of Excel. It seems to work for sgpdd-survey results, and is being extended to work for obdfilter-survey results. DDN S2A 9550 TESTING: Several sgpdd-survey runs have been completed. With the right settings, including 2-tier LUNs and 4 MB IOs, reasonable performance has been measured. Work with obdfilter-survey was started but didn't get very far - kernel patches are required to enable 4 MB IOs, and the patches in bug 9945 do not seem to be a complete set. DDN suggests trying other cache segment sizes (all runs were performed with 1024 KiB) - 512 is apparently good on SATA and 2048 is apparently good on FC. We also need to test more than one port at once. I suggest testing all 8 ports on a couplet at once. Hopefully, performance will still be stable but if not, try smaler sets of ports to discover where the problem is introduced. Braam suggests testing with "many, many more" regions or objects also. THUMPER TESTING: sgpdd-survey has been run. Results are not great, but match the best we have seen elsewhere. When running obdfilter-survey, there were several problems. I've sent statistics and data to Alex for analysis (/proc/mdstat, vmstat 1, /proc/fs/ldiskfs/*/mb_history, brw_stats for every involved OST.) Note that next time OSTs are up on Thumper would be a good time to look into bug 11484 (see comment 4.) _______________________________________________ Lustre-devel mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-devel
