[Lustre-discuss] Queries regarding Lustre Throughput Numbers with mdtest benchmark

[vilobh meshram]

Hi,

I have a query regarding Lustre Throughput Numbers with mdtest benchmark.I
am running mdtest benhmark with following options :-

/home/meshram/mpich2-new/mpich2-1.4/mpich2-install/bin/mpirun -np 256
-hostfile ./hostfile ./mdtest -z 3 -b 10 -I 5 -v -d /tmp/l66


where ,
mdtest - is the standard benchmark to test metadata operations. [
https://computing.llnl.gov/?set=code&page=sio_downloads ]
/tmp/l66 is my Lustre mount.
I am using 1Gige Network with TCP transport.
hostfile has 8 host nodes
I am varying the number of processes as we can see in following table .
I was amazed by the throughput which I got. I think this is too huge. Can
someone please let me know if these numbers are correct ?



4 Process      : File creation     :      0.501 sec,  44392.140 ops/sec
8 Process      : File creation     :      0.685 sec,  64890.598 ops/sec
16 Process    : File creation     :      1.426 sec,  62318.798 ops/sec
32 Process    : File creation     :      2.947 sec,  60312.766 ops/sec
64 Process    : File creation     :      5.630 sec,  63142.760 ops/sec
128 Process  : File creation     :     13.208 sec,  53835.707 ops/sec
256 Process  : File creation     :     24.601 sec,  57804.777 ops/sec

Thanks,
Vilobh
Graduate Research Associate
Department of Computer Science
The Ohio State University Columbus Ohio
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