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How to use "data retrieve -m max"

Hi,

my customer is trying to get a the maximum IO peak within a specific period of time out of the dfm database. This is the command that he is using:

dfm perf data retrieve -o netapp14 -C volume:total_ops -b "2013-02-19 10:00:00" -e "2013-02-20 10:00:00" -s 3600 -m max

( -m The statistical computation. Valid values are min, max, mean and value_at_percentile.)

But the output seems to make no sense. As you can see he gets about 4400 IO at 14:01:24 and again about 4400 IO at 15:01:24. The max value reported at the end is between those timestamps at 14:16:07. But the value is 1.698.977 which is unrealistically high. Any ideas what goes wrong?

Timestamp       netapp14:acs183_PARvg_2m:total_ops

-------------------------------------------------------------------------------

2013-02-19 11:01:24     5173.250

2013-02-19 12:01:24     2699.383

2013-02-19 13:01:24     6140.242

2013-02-19 14:01:24     4439.869

2013-02-19 15:01:24     4432.061

2013-02-19 16:01:24     4968.500

2013-02-19 17:01:24     3522.581

2013-02-19 18:01:24     437.213

2013-02-19 19:01:24     1369.851

2013-02-19 20:01:24     552.579

2013-02-19 21:01:24     360.671

2013-02-19 22:01:24     2931.867

2013-02-19 23:01:24     122.489

2013-02-20 00:01:24     93.911

2013-02-20 01:01:24     149.078

2013-02-20 02:01:24     429.067

2013-02-20 03:01:24     178.187

2013-02-20 04:01:24     523.373

2013-02-20 05:01:24     122.867

2013-02-20 06:01:24     1256.639

2013-02-20 07:01:24     1138.622

2013-02-20 08:01:24     2094.267

2013-02-20 09:01:24     2052.811

2013-02-20 09:58:50     3268.733

Timestamp       netapp14:acs183_PARvg_2m:total_ops (max)

-------------------------------------------------------------------------------

2013-02-19 14:16:07     1698977.000

Thanks,

Thorsten

Re: How to use "data retrieve -m max"

Your --s 3600 here mean sample rate

Sample rate (in seconds). This interval will be used to consolidate

        the output data. The available data will be split into regions as

        specified by the sample rate and the last sample in each of those

        regions will be displayed. Also used for window calculation for metrics.

Use -s 60 and you should be able to achieve what you want.

Regards

adai