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| -rw-r--r-- | release_docs/INSTALL_parallel | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/release_docs/INSTALL_parallel b/release_docs/INSTALL_parallel index b0e0a86..e8f8bad 100644 --- a/release_docs/INSTALL_parallel +++ b/release_docs/INSTALL_parallel @@ -61,7 +61,7 @@ The "--enable-parallel" is optional in this case. Make sure your environment variables are set correctly to compile and execute a single process mpi applications for the SP machine. Unfortunately, the setting varies from machine to machine. E.g., the following works for the -Blue machine of LLNL. +IBM SP machine at LLNL. setenv MP_PROCS 1 setenv MP_NODES 1 @@ -102,7 +102,7 @@ This allows for >2GB sized files on Linux systems and is only available with Linux kernels 2.4 and greater. -2.4. Red Storm (Cray XT3) (for v1.8 only) +2.4. Red Storm (Cray XT3) (for v1.8 and later) ------------------------- The following steps are for building the Parallel HDF5 for the Red Storm compute nodes. They would probably work for other Cray XT3 systems but have @@ -180,15 +180,28 @@ environment variable at the time `make check' is run (or the value 3). 4. Parallel test suite ---------------------- -The testpar/ directory contains tests for Parallel HDF5 and MPI-IO. The t_mpi -tests the basic functionalities of some MPI-IO features used by Parallel HDF5. -It usually exits with non-zero code if a required MPI-IO feature does not -succeed as expected. One exception is the testing of accessing files larger -than 2GB. If the underlying filesystem or if the MPI-IO library fails to -handle file sizes larger than 2GB, the test will print informational messages -stating the failure but will not exit with non-zero code. Failure to support -file size greater than 2GB is not a fatal error for HDF5 because HDF5 can -use other file-drivers such as families of files to bypass the file size limit. +The testpar/ directory contains tests for Parallel HDF5 and MPI-IO. Here are +some notes about some of the tests. + +The t_mpi tests the basic functionalities of some MPI-IO features used by +Parallel HDF5. It usually exits with non-zero code if a required MPI-IO +feature does not succeed as expected. One exception is the testing of +accessing files larger than 2GB. If the underlying filesystem or if the +MPI-IO library fails to handle file sizes larger than 2GB, the test will +print informational messages stating the failure but will not exit with +non-zero code. Failure to support file size greater than 2GB is not a fatal +error for HDF5 because HDF5 can use other file-drivers such as families of +files to bypass the file size limit. + +The t_posix_compliant tests if the file system is POSIX compliant when POSIX +and MPI IO APIs are used. This is for information only and it always exits +with 0 even when non-compliance errors have occurred. This is to prevent +the test from aborting the remaining parallel HDF5 tests unnecessarily. + +The t_cache does many small sized I/O requests and may not run well in a +slow file system such as NFS disk. If it takes a long time to run it, try +set the environment variable $HDF5_PARAPREFIX to a file system more suitable +for MPI-IO requests before running t_cache. By default, the parallel tests use the current directory as the test directory. This can be changed by the environment variable $HDF5_PARAPREFIX. For example, |