[Darshan-users] Darshan pre-release 2.2.4-pre4

Rob Latham robl at mcs.anl.gov
Tue Nov 20 11:05:04 CST 2012


On Tue, Nov 20, 2012 at 11:55:52AM -0500, Phil Carns wrote:
> darshan-2.2.4-pre4
> =============
> * Disable extra stat() of newly opened files by default in order
>   to improve performance on shared files.  Reported by Yushu Yao.
>   - prevents Darshan from reporting SIZE_AT_OPEN, FILE_ALIGNENT, and
>     DARSHAN_FILE_NOT_ALIGNED values
>   - features can still be enabled via --enable-stat-at-open option

Hi Phil.  FILE_ALIGNENT is maybe one of the most important metrics for
understanding poor GPFS write performance.  

==rob

-- 
Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA


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