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authorMuQun Yang <ymuqun@hdfgroup.org>2007-08-24 17:56:36 (GMT)
committerMuQun Yang <ymuqun@hdfgroup.org>2007-08-24 17:56:36 (GMT)
commit18c30d67ed50d44f7e92a7083da8fd566445e90a (patch)
treeaaad559940e1026d7a5ecc4d43156838db503981
parent51073136ce409884c772b712a69f1264a50f8252 (diff)
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[svn-r14110] Document MPI-IO compiler problem on tungsten.
-rw-r--r--release_docs/RELEASE.txt20
1 files changed, 20 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 6e4d24c..ac19eaa 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -1159,6 +1159,26 @@ Alpha OpenVMS 7.3.2 n n n y n n
Known Problems
==============
+* We discovered two problems when running collective IO parallel HDF5 tests
+ with chunking storage on ChaMPIon MPI compiler on tungsten, a linux
+ cluster at NCSA.
+ Under some complex selection cases,
+ 1) MPI_Get_element returns the wrong value.
+ 2) MPI_Type_struct also generates wrong derived data type and corrupt data
+ may be generated.
+ This only happens when turning on collective IO with chunking storage
+ with some complex selections. We haven't found these problems on other
+ MPI-IO compilers. If you encounter these problems, you may use Independent IO
+ instead.
+
+ Change the following line in your code:
+ H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_COLLECTIVE);
+
+ to
+ H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_INDEPENDENT);
+
+ KY - 2007/08/24
+
* For SNL, spirit/liberty/thunderbird: The serial tests pass but parallel
tests failed with MPI-IO file locking message. AKC - 2007/6/25.
* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers use