Sun X4500 (thumper) with 16Gb of memory running Solaris 10 U6 with patches current to the end of Feb 2009.
Current ARC size is ~6Gb. ZFS filesystem created in a ~3.2 Tb pool consisting of 7 sets of mirrored 500Gb SATA drives. I used 4000 8Mb files for a total of 32Gb. run 1: ~140M/s average according to zpool iostat real 4m1.11s user 0m10.44s sys 0m50.76s run 2: ~37M/s average according to zpool iostat real 13m53.43s user 0m10.62s sys 0m55.80s A zfs unmount followed by a mount of the filesystem returned the performance to the run 1 case. real 3m58.16s user 0m11.54s sys 0m51.95s In summary, the second run performance drops to about 30% of the original run. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
