[p4] fstst.exe statistics

Wed Feb 14 03:37:11 PST 2007

Hi all,

We have been experiencing slowdowns on our Perforce for some time and
have made many, many changes and tests to try and find out where our
bottleneck lies. The slowdowns tend to affect all clients and cause the
client to timeout or, at best, take up to 2 or three minutes to connect
to the server. All of a sudden snap! and everything is back to normal.

We have 30 clients on a Gb network spread over 3 switches connected with
2Gb pipes. The server also has a teamed 2Gb NIC. We run a Proliant DL380
with and MSA20 with 3Tb RAID5 (directly attached through SCSi). The
server has 2Gb RAM (about to be upgraded to 4). Our depot is approx 60Gb
and our db files total 800Mb. The Proliant and MSA are both dedicated to
running Perforce.

Potential culprits we have identified:

Network bottleneck (i.e. 2 clients on 3rd switch try to force sync
having to pass to 1st switch to get to P4)

Lack of operational RAM

Unbalanced db's

SCSi throughput issues

RAID read capability (when tape backups are run we see similar problems
- even though on diff SCSi adapter)

I have recently got hold of the fstst.exe from Perforce and run it on
our server and wanted to post our results to compare to other peoples.
Could anyone else please post theirs so we can get an idea of the
comparable performance of other servers?

BlkCnt BlkSiz  Test Files

            KB      1      Avg

   Write MB/Second

 4096      2    262.14 262.14

 4096      4    541.20 541.20

 4096      8    541.20 541.20

 2048     16   1048.58         1048.58

 2048     64   1073.74         1073.74

 1024    128   1231.36         1231.36

 1024    256   188.77 188.77

 1024    512   7.90    7.90

   Read-Write MB/Second

 4096      2    178.48 178.48

 4096      4    266.31 266.31

 4096      8    195.08 195.08

 2048     16   102.30 102.30

 2048     64   286.18 286.18

 1024    128   232.21 232.21

 1024    256   301.27 301.27

 1024    512   11.99  11.99

   Write MB/Second (Commit)

 4096      2    0.45    0.45

 4096      4    1.22    1.22

 4096      8    1.46    1.46

 2048     16   3.79    3.79

 2048     64   20.85  20.85

 1024    128   16.30  16.30

 1024    256   16.30  16.30

 1024    512   15.96  15.96

   Read-Write MB/Second (Commit)

 4096      2    0.25    0.25

 4096      4    0.40    0.40

 4096      8    1.26    1.26

 2048     16   1.97    1.97

 2048     64   3.52    3.52

 1024    128   4.52    4.52

 1024    256   6.96    6.96

 1024    512   14.63  14.63

   Read MB/Second

 4096      2    19.20  19.20

 4096      4    12.48  12.48

 4096      8    33.03  33.03

 2048     16   33.55  33.55

 2048     64   51.13  51.13

 1024    128   48.25  48.25

 1024    256   44.06  44.06

 1024    512   45.93  45.93

   Write MB/Second (Commit After)

 4096      2    53.77  53.77

 4096      4    11.42  11.42

 4096      8    37.04  37.04

 2048     16   15.23  15.23

 2048     64   17.21  17.21

 1024    128   12.12  12.12

 1024    256   13.78  13.78

 1024    512   14.21  14.21

   Read-Write MB/Second (Commit After)

 4096      2    28.24  28.24

 4096      4    20.66  20.66

 4096      8    29.03  29.03

 2048     16   19.70  19.70

 2048     64   17.75  17.75

 1024    128   24.47  24.47

 1024    256   15.52  15.52

 1024    512   17.15  17.15

Benjamin Nias

Systems Administrator

Rocksteady Studios Limited

http://www.rocksteadyltd.com <http://www.rocksteadyltd.com/> 

desk +44 (0)20 7284 3100 

fax +44 (0)20 7284 3100 

mobile +44 (0)7711 554407

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