Compilation in Bluegen with blrts_xlf90

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fugaga · #1 Unread post by **fugaga** » Tue Apr 01, 2008 9:16 pm

Hi all.

I am trying to set up ROMS 3.0 in Bluegene supercomputer, and looking for some advice.

Since the ROMS package does not provide *.mk files for the combination of Linux-xlf90 in Bluegene.

Anyone who is running ROMS in Bluegene?

Thanks in advance.

James

kate · #2 Unread post by **kate** » Wed Apr 02, 2008 4:40 pm

My understanding is that Bluegene is what used to be called a SIMD machine (single instruction, multiple data). As such, all of the I/O will have to be rewritten to work on that system. ARSC was offered the chance to buy such a beast a few years back and we bought a Sun Linux cluster instead because of that. However, Cray also told us we should rewrite the I/O to be parallel since that will become (if it isn't already) our biggest bottleneck in scaling to more processors.

We are planning to go with NetCDF 4 and its use of HDF5's MPI-I/O as our route to parallel I/O. I don't know if that works on Bluegene though. Has anyone switched to making HDF5 files?