Modify RELEASE.txt in response to PR comments

1 files changed, 15 insertions, 17 deletions

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 1503ac1..31a80f6 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -250,16 +250,6 @@ New Features
 
       (MSB - 2019/01/02, HDFFV-10652)
 
-    - Supporting 2GB IO with MPI 2 functionality was implemented and tested.
-      The proposed support recognizes IO operations > 2GB and if the datatype
-      is not a derived type, breaks the IO into chunks which can be input or
-      output with the existing MPI 2 limitations, e.g. size reporting and function
-      API size/count arguments are restricted to be 32 bit integers.
-      Derived types in which the datatype size is > 2GB still result in
-      IO failures. As a result, this BUG remains unresolved.
-
-      (RAW - 2019/02/14, HDFFV-10540)
-
     Fortran Library:
     ----------------
     - Added wrappers for dataset object header minimization calls.
@@ -1038,15 +1028,23 @@ Known Problems
     CPP ptable test fails on VS2017 with Intel compiler, JIRA issue: HDFFV-10628.
     This test will pass with VS2015 with Intel compiler.
 
-    Older MPI-2 libraries such as OpenMPI 2.0.1 and MPICH 2.1.5 were tested
+    Older MPI libraries such as OpenMPI 2.0.1 and MPICH 2.1.5 were tested
     while attempting to resolve the Jira issue: HDFFV-10540.
     The known problems of reading or writing > 2GBs when using MPI-2 was
-    partially resolved with the MPICH library but OpenMPI testing produces
-    too many errors.  Within a single parallel test (testphdf5), the following
-    subtests report data verfication errors (cdsetr, eidsetr) before eventually
-    aborting.  More recent versions (v3.1.3 or newer) of OpenMPI appear to have
-    resolved most of the known testing problems even though occasional test
-    hangs have been observed.
+    partially resolved with the MPICH library. The proposed support recognizes
+    IO operations > 2GB and if the datatype is not a derived type, the library
+    breaks the IO into chunks which can be input or output with the existing
+    MPI 2 limitations, i.e. size reporting and function API size/count
+    arguments are restricted to be 32 bit integers.  For derived types larger
+    than 2GB, MPICH 2.1.5 fails while attempting to read or write data.
+    OpenMPI in contrast, implements MPI-3 APIs even in the older releases
+    and thus does not suffer from the 32 bit size limitation described here.
+    OpenMPI releases prior to v3.1.3 appear to have other datatype issues however,
+    e.g. within a single parallel test (testphdf5) the subtests (cdsetr, eidsetr)
+    report data verfication errors before eventually aborting.
+    The most recent versions of OpenMPI (v3.1.3 or newer) have evidently
+    resolved these isses and parallel HDF5 testing does not currently report
+    errors though occasional hangs have been observed.
 
     Known problems in previous releases can be found in the HISTORY*.txt files
     in the HDF5 source. Please report any new problems found to