RELEASE.txt entry for PR #4843 (#4860)

HDFGroup · Sep 19, 2024 · b382a8e · b382a8e
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diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
@@ -829,6 +829,19 @@ Bug Fixes since HDF5-1.14.0 release
 ===================================
  Library
  -------
+ - Fixed a bug with large external datasets
+
+ When performing a large I/O on an external dataset, the library would only
+ issue a single read or write system call. This could cause errors or cause
+ the data to be incorrect. These calls do not guarantee that they will
+ process the entire I/O request, and may need to be called multiple times
+ to complete the I/O, advancing the buffer and reducing the size by the
+ amount actually processed by read or write each time. Implemented this
+ algorithm for external datasets in both the read and write cases.
+
+ Fixes GitHub #4216
+ Fixes h5py GitHub #2394
+
  - Fixed a bug in the Subfiling VFD that could cause a buffer over-read
  and memory allocation failures