October 2014 - Darshan-users - mailman3.cels.anl.gov

Darshan 2.3.1-pre1 release
by Phil Carns 29 Oct '14

29 Oct '14

Darshan 2.3.1-pre1 is now available for download on the Darshan web site, and the release changelog is listed below. Please let us know if you have any feedback or suggestions. We'll be working to turn this into a stable release in the coming weeks. thanks -Darshan development team darshan-2.3.1-pre1 ============= * Add wrappers for mkstemp(), mkostemp(), mkstemps(), and mkostemps() (reported by Tom Peterka) * Change OPEN_TIMESTAMP field to report timestamp right before open() is invoked rather than after timestamp after open is completed. NOTE: updated log format version to 2.06 to reflect this change. * Change start_time and end_time fields in job record to use min and max (respectively) across all ranks * Fix bug in write volume data reported in file system table in darshan-job-summary.pl (reported by Matthieu Dorier) * Clean up autoconf test for zlib and make zlib mandatory (reported by Kalyana Chadalavada) * add --start-group and --end-group notation to Darshan libraries for Cray PE 2.x environment to fix link-time corner cases (Yushu Yao) * improve y axis labels on time interval graphs in darshan-job-summary.pl (reported by Tom Peterka) * misc. improvements to darshan-parser --perf output (reported by Shane Snyder) - indicate which rank was slowest in unique file results - label I/O vs. meta time more clearly - include unique file meta time in agg_perf_by_slowest calculation

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Introducing Darshan-Web
by Matthieu Dorier 17 Oct '14

17 Oct '14

Dear Darshan users/developers, The Darshan-Ruby tool has led to the development of Darshan-Web, a web interface to analyze Darshan log files. A demo of this interface is available here: http://darshan-web.irisa.fr/ If you're interested in trying it with your own log files, the installation procedure is described here: http://darshan-ruby.gforge.inria.fr/ Please note that this is a prototype. We are very interested in getting feedbacks from potential users. The intern who developed this interface has left and those feedbacks can determine whether we hire new people to continue the development. Matthieu Dorier PhD student at ENS Rennes http://people.irisa.fr/Matthieu.Dorier

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Upcoming Darshan events, Fall 2014
by Phil Carns 03 Oct '14

03 Oct '14

Here are some upcoming events that might be of interest to the Darshan community: * October 26, 2014, Raleigh NC: “*Darshan – I/O Workload Characterization for MPI Applications*” tutorial to be held at IISWC 2014. The presenters are Yushu Yao of Lawrence Berkeley National Laboratory and Phil Carns of Argonne National Laboratory. For more information see the tutorial website (http://www.mcs.anl.gov/research/projects/darshan/tutorials/iiswc2014/) or the conference web site (http://www.iiswc.org/iiswc2014/index.html) * November 20, 2014, New Orleans LA: “*Analyzing Parallel I/O*” BOF at SC 2014. This BOF will include a discussion of multiple I/O instrumentation tools, including Darshan. The session leaders are Julian Kunkel (German Climate Computing Center), Phil Carns (Argonne National Laboratory), and Alvaro Aguilera (Technical University Dresden). For more information see the SC BOF website (http://sc14.supercomputing.org/schedule/event_detail?evid=bof121) thanks, -Phil

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