Merge 3e64be2 into 992e2ea

LLNL · Jan 5, 2021 · 4742458 · 4742458
2 parents 992e2ea + 3e64be2
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -18,6 +18,12 @@ and this project aspires to adhere to [Semantic Versioning](https://semver.org/s
 - Added a builtin sandboxed header-only version of fmt. The namespace and directory paths were changed to `conduit_fmt` to avoid potential symbol collisions with other codes using fmt. Downstream software can use by including `conduit_fmt/conduit_fmt.h`.
 - Added support for using C++11 initializer lists to set Node and DataArray values from numeric arrays. See C++ tutorial docs (https://llnl-conduit.readthedocs.io/en/latest/tutorial_cpp_numeric.html#c-11-initializer-lists) for more details.
 
+#### Relay
+- Added Relay IO Handle mode support for `a` (append) and `t` (truncate).  Truncate allows you to overwrite files when the handle is opened. The default is append, which preserves prior IO Handle behavior.
+- Added `conduit::relay::io::blueprint::save_mesh` variants, these overwrite existing files (providing relay save semantics) instead of adding mesh data to existing files. We recommend using  `save_mesh` for most uses cases, b/c in many cases `write_mesh` to an existing HDF5 file set can fail due to conflicts with the current HDF5 tree.
+- Added `truncate` option to `conduit::relay::io::blueprint::write_mesh`, this is used by `save_mesh`.
+- Improve capture and reporting of I/O errors in `conduit::relay::[mpi::]io::blueprint::{save_mesh|write_mesh}`. Now in the MPI case, If any rank fails to open or write to a file all ranks will throw an exception.
+
 
 ## [0.6.0] - Released 2020-11-02