Hi Jeff,
AFAIK as previously mentioned, only _network_ speed is affected.
But did you think of the *priority *command? There you can change relative (!) priorities, e.g. system (-> SnapMirror) vs. user.
*priority set volume /prodvol /level=high system=low* Set the priority scheduling policy for volume /prodvol /to /high /compared to other volumes. Also prioritize system operations for the volume /low /compared to user operations on the same volume. These options are enabled by this operation if *priority on* has been previous issued.
So you would set 'level=high' on the volumes where the users are impacted and 'system=low' and maybe "level=low" (if the source isn't the one where the users are impacted) to the volumes involved in the SnapMirror.
Don't forget to set 'priority on'. And maybe 'priority off' after the snapmirror is through if you want to go back to the previous behavior.
HTH (Hi Oldtimers, still know this one? - Hope That Helps...)
Sebastian
On 01.08.2013 07:15, Jeff Cleverley wrote:
I did try different positions for the -k. It didn't seem to matter.
Jeff
On Wed, Jul 31, 2013 at 8:45 PM, steve klise <sklise@hotmail.com mailto:sklise@hotmail.com> wrote:
I am not sure, but you may want to change your syntax to put the -k before the -S; Not sure if that really matters, but this is what I found in one of the docs.. Good luck. snapmirror update [-k /n/] -S /source_system/:/source_volume/ // [/dest_system/:]/dest_volume/ ------------------------------------------------------------------------ Date: Wed, 31 Jul 2013 19:54:46 -0600 Subject: Snapmirror throttle not working From: jeff.cleverley@avagotech.com <mailto:jeff.cleverley@avagotech.com> To: Toasters@teaparty.net <mailto:Toasters@teaparty.net> 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 _______________________________________________ Toasters mailing list Toasters@teaparty.net <mailto:Toasters@teaparty.net> http://www.teaparty.net/mailman/listinfo/toasters-- Jeff Cleverley Unix Systems Administrator 4380 Ziegler Road Fort Collins, Colorado 80525 970-288-4611
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