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

--
Jeff Cleverley
Unix Systems Administrator
4380 Ziegler Road
Fort Collins, Colorado 80525
970-288-4611

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