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3par performance questions

dennischen
Advisor

3par performance questions

Hi,

I met some 3par performance problems. hope someone can guide me, thanks in advance.

1, what is the difference between statvv and statvlun. The IOPS and IO are the same in statvv and statvlun. But the servicetime is different.  Seems like the service time of statvlun is the response time to the host. So what dose it in statvv mean?

statvlun.pngthe service time in statvlun is around 28statvv.pngthe service time of statvv is about 0.4ms

 

2, When I simulate the IO test by IOMeter from Windows 2008 host. Storage is 3par SS20840 I take the 8MB seq write test. From the host IOMeter, I see the IOPS is 340. But in the storage side, I see the IOPS is about 5500. Why they are different?

iometer1.pngiometer2.pngiometer3.pngstatvlun of 8M seq write.png

 

statport is as bellow..Thanks!

16:00:48 07/26/2017 r/w I/O per second         KBytes per sec      Svt ms     IOSz KB     

     Port       D/C      Cur  Avg  Max     Cur     Avg    Max   Cur   Avg   Cur   Avg Qlen

    0:5:1      Data   r    0    1    4       0      10     33  0.00  1.13   0.0   8.6    -

    0:5:1      Data   w  363  353  363  194452  188453 194452 27.26 28.29 535.2 534.1    -

    0:5:1      Data   t  363  354  363  194452  188462 194452 27.26 28.21 535.2 532.4    7

    0:5:2      Data   r    2    2    3      13      12     20  0.19  0.13   6.5   7.8    -

    0:5:2      Data   w  378  364  378  202378  194964 202378 28.19 29.84 535.2 535.0    -

    0:5:2      Data   t  380  366  380  202391  194976 202391 28.05 29.72 532.5 532.8   10

    0:5:3      Data   r    0    2    4       0      15     33  0.00  0.50   0.0   7.2    -

    0:5:3      Data   w  362  360  362  194451  192045 194451 28.00 28.37 536.6 534.1    -

    0:5:3      Data   t  362  362  364  194451  192060 194451 28.00 28.21 536.6 531.1   10

    0:5:4      Data   r    2    2    3      17      13     26  0.10  0.31   8.8   8.7    -

    0:5:4      Data   w  376  361  376  201321  193467 201321 29.84 29.59 535.2 535.2    -

    0:5:4      Data   t  378  363  378  201338  193480 201338 29.69 29.46 532.5 533.0   13

    1:5:1      Data   r    1    1    5       9      11     40  0.09  0.09   8.8   8.2    -

    1:5:1      Data   w  363  360  363  194451  191992 194451 28.02 28.40 535.2 534.0    -

    1:5:1      Data   t  364  361  364  194460  192003 194460 27.95 28.29 533.8 532.0   11

    1:5:2      Data   r    2    2    4      17      14     31  0.14  0.09   8.8   8.1    -

    1:5:2      Data   w  376  363  376  201320  193994 201320 29.86 29.63 535.2 533.8    -

    1:5:2      Data   t  378  365  378  201338  194007 201338 29.71 29.49 532.5 531.4   12

    1:5:3      Data   r    1    2    3       9      12     23  0.10  0.98   8.8   7.5    -

    1:5:3      Data   w  364  360  364  193924  191973 193924 27.54 28.24 532.3 533.7    -

    1:5:3      Data   t  365  361  365  193933  191984 193933 27.47 28.12 530.9 531.5   11

    1:5:4      Data   r    3    2    4      26      19     30  0.10  0.09   8.8   8.0    -

    1:5:4      Data   w  379  369  379  202378  197361 202378 28.43 28.01 533.9 534.2    -

    1:5:4      Data   t  382  372  382  202404  197380 202404 28.21 27.83 529.8 530.9    9

    2:5:1      Data   r    2    2    4       8      14     33  0.61  0.59   4.2   7.7    -

    2:5:1      Data   w  363  360  363  194484  192049 194484 27.74 28.20 535.2 534.1    -

    2:5:1      Data   t  365  361  365  194492  192063 194492 27.60 28.06 532.3 531.5   10

    2:5:2      Data   r    2    2    6      17      16     43  0.08  0.09   8.8   7.5    -

    2:5:2      Data   w  363  367  392  195012  188387 195012 13.37 20.25 536.6 512.6    -

    2:5:2      Data   t  365  370  393  195029  188403 195029 13.30 20.13 533.8 509.8    2

    2:5:3      Data   r    3    2    5      19      17     38  3.16  0.69   6.6   7.8    -

    2:5:3      Data   w  364  360  364  193956  192050 193962 27.38 28.12 532.3 534.1    -

    2:5:3      Data   t  367  362  367  193976  192067 193977 27.19 27.95 528.1 530.9   11

    2:5:4      Data   r    2    2    4      13      13     30  1.34  0.28   6.5   8.1    -

    2:5:4      Data   w  377  364  377  177305  178561 194029 29.05 30.41 470.1 490.9    -

    2:5:4      Data   t  379  365  379  177318  178575 194038 28.90 30.27 467.7 488.7    6

    3:5:1      Data   r    2    1    2      17       9     18  0.06  0.44   8.8   8.3    -

    3:5:1      Data   w  366  359  366  194401  191969 194401 26.97 27.99 530.9 534.4    -

    3:5:1      Data   t  368  360  368  194419  191978 194419 26.83 27.90 528.1 532.7   10

    3:5:2      Data   r    0    1    4       0      12     35  0.00  0.11   0.0   8.3    -

    3:5:2      Data   w  377  362  377  201268  193390 201268 29.35 29.47 533.8 534.4    -

    3:5:2      Data   t  377  363  377  201268  193402 201268 29.35 29.36 533.8 532.3   13

    3:5:3      Data   r    1    2    8       9      14     55  0.06  0.32   8.8   7.5    -

    3:5:3      Data   w  364  359  364  194404  191894 194404 27.06 28.01 533.8 535.2    -

    3:5:3      Data   t  365  360  368  194412  191908 194412 26.99 27.87 532.3 532.5   11

    3:5:4      Data   r    3    2    6      26      17     42  0.10  0.27   8.8   8.1    -

    3:5:4      Data   w  372  361  372  199682  192942 199682 29.27 27.35 536.6 534.4    -

    3:5:4      Data   t  375  363  375  199708  192958 199708 29.04 27.20 532.5 531.3   17

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

       16      Data   r   26   27          201     217         0.59  0.37   7.9   7.9    -

       16      Data   w 5911 5782      3135185 3065491        27.36 28.13 530.4 530.2    -

       16      Data   t 5936 5809      3135386 3065708        27.25 28.00 528.2 527.8  163
1 REPLY
Dennis Handly
Acclaimed Contributor

Re: HPE 3PAR performance questions

> what is the difference between statvv and statvlun. 

 

statvlun is the I/O that comes from the hosts.  statvv includes that and also from I/O generated on the array.

The latter could include Remote Copy and createvvcopy.