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Diffstat (limited to 'release_docs/RELEASE.txt')
| -rw-r--r-- | release_docs/RELEASE.txt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index c4fb276..0398e4a 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -64,6 +64,9 @@ New Features Configuration: -------------- + - Added a macro hdf5_mpi_special_collective_io_works to filter out + some mpi-io packages that don't support collective IO for no IO + contributions in some processes. -KY 2006/2/16 - Added -shlib option to link against installed shared libraries to h5c++ and h5fc. -JML 2005/11/1 - Added --enable-build-all option to configure, which only developers @@ -158,6 +161,35 @@ New Features Library: -------- + - Added managements of collective IO supports for chunking storage + inside parallel HDF5 + 1) Implemented One IO with collective mode for all chunks in the + application by building one MPI derived datatype accross all + chunks. + 2) Implemented the decision-making support to do collective IO inside + MPI-IO per chunk. + 3) Added the decision-making support to do one IO accross all chunks + or to do multiple IOs with each IO per chunk. + 4) Added the support to handle the case some processes won't do any IOs in + collectively. + 5) Some MPI-IO package(mpich 1.2.6 or lower, e.g.) cannot handle + collective IO correctly for the case when some processes have no + contributions to IOs, a special macro is added to change + collective IO mode to independent IO mode inside HDF5 library. + + Currently we find that MPICH at Linux and vender MPI-IO package at NCSA + Altix cannot handle this case. + + "hdf5_mpi_special_collective_io_works=${hdf5_mpi_special_collective_io_works='no'}" + has been added at the end of file <ia64-linux-gnui> and + <linux-gnulibc1>. + + If MPI-IO packages at your Linux and Altix support this case, + please comment out the last line and report to us at + hdfhelp@ncsa.uiuc.edu. We can tune in our configuration to + support this. + + KY - 2006/02/16 - Added character encoding to attribute creation property lists. JML - 2006/01/02 - Added H5Gcopy() routine to copy objects between while keeping |