diff --git a/HISTORY.md b/HISTORY.md new file mode 100644 index 000000000..912599bc9 --- /dev/null +++ b/HISTORY.md @@ -0,0 +1,39 @@ +# Rocksdb Change Log + +## 2.7.0 (01/28/2014) + +### Public API changes + +* Renamed `StackableDB::GetRawDB()` to `StackableDB::GetBaseDB()`. +* Renamed `WriteBatch::Data()` `const std::string& Data() const`. +* Renamed class `TableStats` to `TableProperties`. +* Deleted class `PrefixHashRepFactory`. Please use `NewHashSkipListRepFactory()` instead. +* Supported multi-threaded `EnableFileDeletions()` and `DisableFileDeletions()`. +* Added `DB::GetOptions()`. +* Added `DB::GetDbIdentity()`. + +### New Features + +* Added [BackupableDB](https://github.com/facebook/rocksdb/wiki/How-to-backup-RocksDB%3F) +* Implemented [TailingIterator](https://github.com/facebook/rocksdb/wiki/Tailing-Iterator), a special type of iterator that + doesn't create a snapshot (can be used to read newly inserted data) + and is optimized for doing sequential reads. +* Added property block for table, which allows (1) a table to store + its metadata and (2) end user to collect and store properties they + are interested in. +* Enabled caching index and filter block in block cache (turned off by default). +* Supported error report when doing manual compaction. +* Supported additional Linux platform flavors and Mac OS. +* Put with `SliceParts` - Variant of `Put()` that gathers output like `writev(2)` +* Bug fixes and code refactor for compatibility with upcoming Column + Family feature. + +### Performance Improvements + +* Huge benchmark performance improvements by multiple efforts. For example, increase in readonly QPS from about 530k in 2.6 release to 1.1 million in 2.7 [1] +* Speeding up a way RocksDB deleted obsolete files - no longer listing the whole directory under a lock -- decrease in p99 +* Use raw pointer instead of shared pointer for statistics: [5b825d](https://github.com/facebook/rocksdb/commit/5b825d6964e26ec3b4bb6faa708ebb1787f1d7bd) -- huge increase in performance -- shared pointers are slow +* Optimized locking for `Get()` -- [1fdb3f](https://github.com/facebook/rocksdb/commit/1fdb3f7dc60e96394e3e5b69a46ede5d67fb976c) -- 1.5x QPS increase for some workloads +* Cache speedup - [e8d40c3](https://github.com/facebook/rocksdb/commit/e8d40c31b3cca0c3e1ae9abe9b9003b1288026a9) +* Implemented autovector, which allocates first N elements on stack. Most of vectors in RocksDB are small. Also, we never want to allocate heap objects while holding a mutex. -- [c01676e4](https://github.com/facebook/rocksdb/commit/c01676e46d3be08c3c140361ef1f5884f47d3b3c) +* Lots of efforts to move malloc, memcpy and IO outside of locks diff --git a/build_tools/make_new_version.sh b/build_tools/make_new_version.sh index ca8a21262..a1ee82720 100755 --- a/build_tools/make_new_version.sh +++ b/build_tools/make_new_version.sh @@ -27,7 +27,6 @@ if [ $GIT_BRANCH != "master" ]; then echo "Error: Current branch is '$GIT_BRANCH', Please switch to master branch." fi -# --Step 1: cutting new tag title "Adding new tag for this release ..." git tag -a "$ROCKSDB_VERSION.fb" -m "Rocksdb $ROCKSDB_VERSION" @@ -38,24 +37,4 @@ export https_proxy="$http_proxy"; title "Pushing new tag to remote repo ..." proxycmd.sh git push origin --tags -# --Step 2: Update README.fb -title "Updating the latest version info in README.fb ..." -sed -i "s/Latest release is [0-9]\+.[0-9]\+.fb/Latest release is $ROCKSDB_VERSION.fb/" README.fb -git commit README.fb -m "update the latest version in README.fb to $ROCKSDB_VERSION" -proxycmd.sh git push - -# --Step 3: Prepare this repo for 3rd release -title "Cleaning up repo ..." -make clean -git clean -fxd - -title "Generating the build info ..." -# Comment out the call of `build_detection_version` so that the SHA number and build date of this -# release will remain constant. Otherwise everytime we run "make" util/build_version.cc will be -# overridden. -sed -i 's/^\$PWD\/build_tools\/build_detect_version$//' build_tools/build_detect_platform - -# Generate util/build_version.cc -build_tools/build_detect_version - title "Done!"