FAS2240 CPU pegged at 100% on ndmpcopy.

[dmandell]

We just recently got a new ha pair of FAS2240 filers with 4 15k sas shelves.

The filer is not yet in production, so there is virtually no load on it.

I started an ndmpcopy on one of the filer heads and was surprised to see the cpu do to 100% and stay there throughout the operation.

Our old FAS3020, FAS3050 and FAS3070 did not exhibit this much of a cpu rise on ndmpcopy. (maybe 50-60%, not 100%)

Is this filer underpowered, or is this expected behavior?

-Dana

[scottgelb]

Probably just one CPU core though. Although I thought 8.1 moved to run in multiple domains. although the local copy command may just run in one core. "syssyst -m 1" probably will show one core pegged and available CPU on the other.

[dmandell]

Thanks for the quick reply.

Unfortunately can't view any stats during ndmpcopy operation as it "ties up" the command line.

[scottgelb]

Or use non interactive Ssh for the other command. Ssh filer command

Sent from my iPhone 4S

[dmandell]

Thanks, never tried that!

It looks like the 100% CPU shown in OnCommand Sytem Manager (GUI) = "ANY" in the command line.

And it does look like the load IS spread out on all 4 CPUs during an ndmpcopy.

I am assuming I should be more concerned with the "AVG" % (30-40%) more what I would expect.

ANY  AVG  CPU0 CPU1 CPU2 CPU3

100%  33%   21%  20%  20%  73%

99%  32%   15%  16%  21%  76%

100%  39%   31%  31%  36%  60%

100%  33%   19%  18%  19%  77%

99%  34%   23%  19%  24%  69%

98%  31%   20%  17%  21%  66%

100%  32%   16%  15%  17%  79%

100%  34%   19%  19%  23%  75%

100%  30%   16%  12%  22%  71%

98%  31%   20%  19%  20%  65%

100%  34%   21%  26%  25%  65%

100%  35%   21%  25%  26%  68%

100%  40%   31%  35%  33%  60%

100%  36%   24%  27%  29%  65%

100%  40%   26%  30%  37%  65%

100%  31%   18%  17%  22%  66%

100%  40%   28%  34%  40%  60%

100%  41%   32%  35%  39%  57%

100%  46%   38%  41%  45%  59%

[scottgelb · Accepted solution]

Any is misleading. Any CPU is usually busy. Good to see 8.1 does even the load. Prior to 8.1 ndmp pegged one core. Good need for all who do ndmp backups

Sent from my iPhone 4S