I have a 3020 filers running 7.1.1, I am confuse by the sysstat:
Disk KB/s is 20MB/s, while FCP(no NFS) is doing 9MB/s, how big is the disk strip size 64KB, I am guessing disk is always IOs at strip size.
Also the FCP IO number is 581 IO/s , and I used statsit command to collect disk usage, it showed there are 23 disks are doing 55 IO/s, so total disk is doing 1265 IO/s, does anybody know why backend disk are doing more IOs than FCP?
Thanks
CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP Disk FCP iSCSI FCP kB/s
in out read write read write age hit time ty util in out
9% 0 0 0 581 1 2 20120 16 0 0 2 98% 0% - 13% 581 0 67 9261
3% 0 0 0 135 0 0 2584 12 0 0 2 95% 0% - 9% 134 0 290 1844
2% 0 0 0 121 0 0 2064 4 0 0 2 95% 0% - 20% 121 0 509 1566
5% 0 0 0 146 0 0 5161 2503 0 0 2 96% 23% T 12% 146 0 255 2053
3% 0 0 0 185 0 0 3404 12 0 0 2 95% 0% - 12% 185 0 136 2499
8% 0 0 0 694 0 0 5694 4 0 0 2 98% 0% - 15% 694 0 2982 3724
9% 0 0 0 400 1 1 18294 12 0 0 2 98% 0% - 18% 400 0 792 11466
6% 0 0 0 306 0 0 12856 16 0 0 2 97% 0% - 25% 306 0 550 7419
7% 0 0 0 242 1 1 6905 4482 0 0 3 96% 28% T 21% 242 0 366 3709
2% 0 0 0 127 0 0 2476 12 0 0 3 95% 0% - 9% 127 0 38 1889
2% 0 0 0 120 1 1 2348 16 0 0 3 96% 0% - 11% 120 0 128 1697
3% 0 0 0 156 0 0 4476 0 0 0 3 96% 0% - 14% 156 0 272 2486
4% 0 0 0 214 1 2 4084 16 0 0 3 95% 0% - 16% 214 0 773 2608
5% 0 0 0 183 1 1 5228 2890 0 0 3 95% 21% Tf 29% 183 0 264 2407
4% 0 0 0 209 7 18 3952 16 0 0 3 95% 2% : 16% 209 0 9 3026
7% 0 0 0 462 0 0 12176 16 0 0 3 97% 0% - 20% 462 0 484 6376
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