JUQUEEN - Prace Training Portal
JUQUEEN - Prace Training Portal
JUQUEEN - Prace Training Portal
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File I/O – Guidelines<br />
Use the correct file system<br />
‒ $WORK has the best performance – use it!<br />
Pay attention to block alignment<br />
‒ Best performance if the I/O is done in chunks with block size of<br />
the file system<br />
‒ $WORK: 4 MB block size<br />
‒ stat() or fstat() can be used to get block size<br />
Use parallel I/O (libraries)<br />
‒ MPI I/O, ADIOS, HDF5, netCDF, SIONlib<br />
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