[gpfsug-discuss] Baseline testing GPFS with gpfsperf

[Scott C Batchelder]

Hello: 

I am wondering if I can get some more information on the gpfsperf tool for 
baseline testing GPFS. I want to record GPFS read and write performance 
for a file system on the cluster before I enable DMAPI and configure the 
HSM interface.  The README for the tool does not offer much insight in how 
I should run this tool based on the cluster or file system settings.  The 
cluster that I will be running this tool on will not have MPI installed 
and will have multiple file systems in the cluster.  Are there some best 
practises for running this tool?  For example:
- Should the number of threads equal the number of NSDs for the file 
system? or equal to the number of nodes? 
- If I execute a large multi-threaded run of this tool from a single node 
in the cluster, will that give me an accurate result of the performance of 
the file system? 

Any feedback is appreciated. 

Thanks. 


Sincerely,

Scott Batchelder

Phone: 1-281-883-7926 
E-mail: scbatche at us.ibm.com


12301 Kurland Dr
Houston, TX 77034-4812
United States


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