====== Darshan ======
---- dataentry analysisTool ----
name           : Darshan
features_ttags : monitoring
layers_ttags   : MPI-IO, POSIX, PNETCDF, HDF5
version        : 2.3.1 (2015-03-13)
webpage_url    : http://www.mcs.anl.gov/research/projects/darshan/
license_ttag   : custom
----


//Darshan is a scalable HPC I/O characterization tool. Darshan is designed to capture an accurate picture of application I/O behavior, including properties such as patterns of access within files, with minimum overhead.//[1]

Darshan enables the user to log an applications I/O usage by running a version of the application compiled with Darshan's instrumentation.

===== Usage =====
The first step is add instrumentation to your application and run it, this process is described in the official [[http://www.mcs.anl.gov/research/projects/darshan/docs/darshan3-runtime.html|Darshan documentation]].

This generates log files from which human readable analysis can be generated.
<code>darshan-job-summary.pl carns_my-app_id114525_7-27-58921_19.darshan.gz</code>.

===== Output =====
Running the above command generates a summary of the applications I/O-usage. An [[http://www.mcs.anl.gov/research/projects/darshan/docs/ssnyder_ior-hdf5_id3655016_9-23-29011-12333993518351519212_1.darshan.pdf|example]] of this can be found in the Darshan documentation.
===== Similar tools =====

---- datarelated ----
cols  : features, layers
max   : 5
sort  : ^name
----


===== Sources =====
[1] http://www.mcs.anl.gov/research/projects/darshan/2009/07/31/welcome-to-the-darshan-project/