Greetings,
I'm running 8.1.2P4, 7-mode on some 6290s. I need to do some snapmirrors to re-balance some disk space. The -k option to throttle the transfer doesn't seem to be having any effect. I've tried modifying the placement of the -k but it doesn't seem to matter. I also tried to modify it after it was running and it doesn't seem to help either. Here is the command I'm running:
snapmirror initialize -S sm15_3 -k 10000 new_sm15_3
If I'm understanding correctly, this should be allowing 10MB/s.
The source and destination are on the same file system. Here is a cut of a sysstat 3 after starting it:
CPU NFS CIFS HTTP Net kB/s Disk kB/s Tape kB/s Cache in out read write read write age
73% 598 0 0 2091 349080 338016 271 0 0 7 71% 1019 0 0 2046 319892 324019 13114 0 0 0s 71% 2800 0 0 3880 330527 343528 17379 0 0 7 69% 1440 0 0 3405 330279 392647 22343 0 0 0s 87% 1614 0 0 2128 320151 607753 168553 0 0 0s 87% 827 0 0 5652 244701 584436 371689 0 0 0s 91% 897 0 0 4242 344072 680454 386373 0 0 0s
As you can see, the disk read/write counts go way up. This is causing some noticeable latency in the nfs access for clients. While I really like the new hardware can pump data around, I need to be able to control it.
What am I doing wrong?
Thanks,
Jeff