[Pvfs2-users] PVFS2 over Infiniband

[Robert Latham]

On Mon, Sep 11, 2006 at 03:38:03PM +0900, Á¶Çý¿µ wrote:
> I measured performance using bonnie and pvfs2-cp.
> 
> When I run bonnie at mount directory by pvfs2(/mnt/pvfs2), the result was
> 
> 3~8MB/seconds(write/block). When pvfs-cp(from local to /mnt/pvfs2) was run,
> the result was about 17~20MB/seconds (write).
> 
> What is the problem? I can not find the reason...

The problem is that bonnie uses a very small block size.  

http://pvfs.org/pvfs2-faq.html#sec:badperf

Do you have an application that will use PVFS? If so, and you can
adjust the way it reads and writes, be sure to use large buffers (on
the order of 4MB) if you can.

==rob

-- 
Rob Latham
Mathematics and Computer Science Division    A215 0178 EA2D B059 8CDF
Argonne National Labs, IL USA                B29D F333 664A 4280 315B