[Beowulf] Improving access to a Linux beowulf cluster for Windows users

[Mikhail Kuzminsky]

In message from Kilian CAVALOTTI <kilian at stanford.edu> (Fri, 18 Apr 
2008 16:38:26 -0700):
...
>The same benchmark on lower-end hardware (E5345) running Linux (same 
>4X 
>DDR IB though), gives roughly 30% better results:
>
>#---------------------------------------------------
># Benchmarking PingPong
># #processes = 2
>#---------------------------------------------------
>       #bytes #repetitions      t[usec]   Mbytes/sec
>            0         1000         4.72         0.00
>            1         1000         4.68         0.20
>            2         1000         4.64         0.41
>            4         1000         4.74         0.81
>            8         1000         4.68         1.63
>           16         1000         4.78         3.19
>           32         1000         4.79         6.37
>           64         1000         4.84        12.61
>          128         1000         6.12        19.95
>          256         1000         6.47        37.71
>          512         1000         7.14        68.40
>         1024         1000         8.53       114.54
>         2048         1000        10.81       180.65
>         4096         1000        14.12       276.58
>         8192         1000        20.99       372.21

:-)
I may add our results on Supermicro H8DCE/Opteron 246 (also slower 
hardware, I think ?) - w/ old Linux (OpenSuSE 10.1) and old OFED 
(1.2):

# Benchmarking PingPong 
# #processes = 2 
#---------------------------------------------------
        #bytes #repetitions      t[usec]   Mbytes/sec
             0         1000         3.17         0.00
             1         1000         3.21         0.30
             2         1000         3.20         0.60
             4         1000         3.20         1.19
             8         1000         3.20         2.38
            16         1000         3.22         4.74
            32         1000         3.27         9.32
            64         1000         3.44        17.77
           128         1000         4.18        29.21
           256         1000         4.47        54.62
           512         1000         5.15        94.83
          1024         1000         6.54       149.29
          2048         1000         8.05       242.76
          4096         1000        10.93       357.42
          8192         1000        16.72       467.14

Also better :-)

Mikhail Kuzminsky
Computer Assistance to Chemical Research Center
Zelinsky Institute of Organic Chemistry
Moscow