Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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diff --git a/src/rocksdb/docs/_posts/2016-03-07-rocksdb-options-file.markdown b/src/rocksdb/docs/_posts/2016-03-07-rocksdb-options-file.markdown
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+---
+title: RocksDB Options File
+layout: post
+author: yhciang
+category: blog
+redirect_from:
+  - /blog/3089/rocksdb-options-file/
+---
+
+In RocksDB 4.3, we added a new set of features that makes managing RocksDB options easier.  Specifically:
+
+  * **Persisting Options Automatically**: Each RocksDB database will now automatically persist its current set of options into an INI file on every successful call of DB::Open(), SetOptions(), and CreateColumnFamily() / DropColumnFamily().
+
+
+
+  * **Load Options from File**: We added [LoadLatestOptions() / LoadOptionsFromFile()](https://github.com/facebook/rocksdb/blob/4.3.fb/include/rocksdb/utilities/options_util.h#L48-L58) that enables developers to construct RocksDB options object from an options file.
+
+
+
+  * **Sanity Check Options**: We added [CheckOptionsCompatibility](https://github.com/facebook/rocksdb/blob/4.3.fb/include/rocksdb/utilities/options_util.h#L64-L77) that performs compatibility check on two sets of RocksDB options.
+
+<!--truncate-->
+
+Want to know more about how to use this new features? Check out the [RocksDB Options File wiki page](https://github.com/facebook/rocksdb/wiki/RocksDB-Options-File) and start using this new feature today!