Hdf5 1 10 parallel comp (#1644)

* Hdf5 1 10 parallel compression merge

1 files changed, 56 insertions, 1 deletions

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index b7c2446..dfae866 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -93,8 +93,46 @@ New Features
 
     Library:
     --------
-    -
+    - Several improvements to parallel compression feature, including:
+
+      * Improved support for collective I/O (for both writes and reads)
+
+      * Significant reduction of memory usage for the feature as a whole
+
+      * Reduction of copying of application data buffers passed to H5Dwrite
+
+      * Addition of support for incremental file space allocation for filtered
+        datasets created in parallel. Incremental file space allocation is the
+        default for these types of datasets (early file space allocation is
+        also still supported), while early file space allocation is still the
+        default (and only supported allocation time) for unfiltered datasets
+        created in parallel. Incremental file space allocation should help with
+        parallel HDF5 applications that wish to use fill values on filtered
+        datasets, but would typically avoid doing so since dataset creation in
+        parallel would often take an excessive amount of time. Since these
+        datasets previously used early file space allocation, HDF5 would
+        allocate space for and write fill values to every chunk in the dataset
+        at creation time, leading to noticeable overhead. Instead, with
+        incremental file space allocation, allocation of file space for chunks
+        and writing of fill values to those chunks will be delayed until each
+        individual chunk is initially written to.
+
+      * Addition of support for HDF5's "don't filter partial edge chunks" flag
+        (https://portal.hdfgroup.org/display/HDF5/H5P_SET_CHUNK_OPTS)
+
+      * Addition of proper support for HDF5 fill values with the feature
 
+      * Addition of 'H5_HAVE_PARALLEL_FILTERED_WRITES' macro to H5pubconf.h
+        so HDF5 applications can determine at compile-time whether the feature
+        is available
+
+      * Addition of simple examples (ph5_filtered_writes.c and
+        ph5_filtered_writes_no_sel.c) under examples directory to demonstrate
+        usage of the feature
+
+      * Improved coverage of regression testing for the feature
+
+      (JTH - 2022/2/23)
 
     Fortran Library:
     ----------------
@@ -151,6 +189,23 @@ Bug Fixes since HDF5-1.10.7 release
 ===================================
     Library
     -------
+    - Fixed a metadata cache bug when resizing a pinned/protected cache entry
+
+      When resizing a pinned/protected cache entry, the metadata
+      cache code previously would wait until after resizing the
+      entry to attempt to log the newly-dirtied entry. This would
+      cause H5C_resize_entry to mark the entry as dirty and make
+      H5AC_resize_entry think that it doesn't need to add the
+      newly-dirtied entry to the dirty entries skiplist.
+
+      Thus, a subsequent H5AC__log_moved_entry would think it
+      needs to allocate a new entry for insertion into the dirty
+      entry skip list, since the entry doesn't exist on that list.
+      This causes an assertion failure, as the code to allocate a
+      new entry assumes that the entry is not dirty.
+
+      (JRM - 2022/02/28)
+
     - Issue #1436 identified a problem with the H5_VERS_RELEASE check in the
       H5check_version function.