On Nov 21, 2007 16:37 -0600, Robert Olson wrote: > On Nov 21, 2007, at 4:30 PM, Andreas Dilger wrote: >> On Nov 19, 2007 13:25 -0600, Robert Olson wrote: >>> OK, early indications are good here. Started out with MDT on PPC with >>> OST >>> on intel, ran iozone up to 1M files and it finished without error and >>> with >>> reasonable performance. >> >> Can you please run "e2fsck -fn" (from a Lustre-patched e2fsprogs) on the >> filesystems after your tests. > > What will that tell me?
It will tell me if some endian bug is corrupting your ext3 filesystem (and possibly if there are endian bugs in our e2fsprogs patches)... >> The extents,mballoc options are primarily aimed at improving the >> performance >> under high load by reducing CPU usage and getting better allocation. if >> you have mostly small files then the performance difference won't be huge. > > is this one of the changes that improves write performance? I've notice > write performance lagging reads. Yes, mballoc+extents does improve write performance. You could do a test on the x86_64 system to compare the difference. Cheers, Andreas -- Andreas Dilger Sr. Software Engineer, Lustre Group Sun Microsystems of Canada, Inc. _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
