Hey all, This question is mostly geared to developers so hopefully there are a few that read this forum.
Is the fssnap module multithreaded? I ask because I backup a fssnaped file system to an LTO2 tape drive and am seeing lousy performance. Iostat is showing both the tape and the fs' disk device and no where near 100% utilized so I am suspecting that the snapshot is the bottleneck. The server is a V890 with 4 CPUs (8 cores) running at 1350 MHz. Also, strangely, I see with mpstat one or two CPU's pegged at 100% in sys with little else going on for that CPU...but I'm not sure if it is related to the heavy reads to the fssnap devices. ... CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 0 0 23 923 1552 1466 539 103 90 226 1 49975 43 48 9 1 1 120 29 5829 1800 1523 1449 467 125 258 2 68604 59 26 14 1 2 0 5 609 24 2 73 21 17 30 0 31888 7 90 1 2 3 249 43 8640 490 202 685 226 94 147 0 182912 72 14 10 4 16 1 127 40502 12736 136 1588 500 168 134 0 214339 45 38 14 4 [b]17 0 0 1 103 1 0 0 0 2 0 0 0 100 0 0 18 0 0 12 1680 13 2 0 0 16 0 0 0 100 0 0[/b] 19 0 41 12955 270 1 1068 342 128 149 1 229939 63 30 5 2 ... I guess if the module is not multithreaded, then the only way to speed up the backup would be to get faster CPU's but if it is, perhaps more CPU's would also help...though the server isn't running very hot during backups (load is about 5-6). Server is running Solaris 9 Generic_118558-18. Thanks --Brett This message posted from opensolaris.org _______________________________________________ perf-discuss mailing list [email protected]
