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Darshan 2.0.0 release

July 22nd, 2010

The Darshan 2.0.0 release is now available for download.  From a user’s perspective, the biggest difference is that you no longer have to run darshan-parser before darshan-job-summary.pl if you just want to see the summary report for a job.  The darshan-job-summary.pl script operates directly on the binary .gz files now.  We also introduced new characterization counters as well as some additional tables in the summary view.  Here is the full change log:

Changelog:

  • new output file format that is portable across architectures (NOTE: Darshan 1.x output files are incompatible with the tools in this release unless they were generated on a ppc32 architecture (Blue Gene))
  • 8 new counters that record the rank of the fastest and slowest process that opened each shared file, along with the number of seconds and number of bytes consumed by those processes.  It also reports the variance in both time and amount of data.
  • new –with-jobid-env configure argument to support recording job identifiers from different schedulers
  • job ID is now recorded within the Darshan log in addition to in the file name
  • darshan-job-summary.pl:
    • opens output files directly without using intermediate darshan-parser output
    • table showing data usage per file system
    • table showing I/O variance in shared files
  • fixes for bugs reported by Noah Watkins:
    • avoid name collision in hashing function
    • divide by zero error in darshan-job-summary.pl
Darshan 2.0.0 is now available on the download page.

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