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Merge branch 'master' into columnfamilies
This commit is contained in:
Igor Canadi
commit
20b231d712
39
HISTORY.md
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39
HISTORY.md
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# Rocksdb Change Log
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## 2.7.0 (01/28/2014)
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### Public API changes
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* Renamed `StackableDB::GetRawDB()` to `StackableDB::GetBaseDB()`.
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* Renamed `WriteBatch::Data()` `const std::string& Data() const`.
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* Renamed class `TableStats` to `TableProperties`.
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* Deleted class `PrefixHashRepFactory`. Please use `NewHashSkipListRepFactory()` instead.
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* Supported multi-threaded `EnableFileDeletions()` and `DisableFileDeletions()`.
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* Added `DB::GetOptions()`.
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* Added `DB::GetDbIdentity()`.
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### New Features
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* Added [BackupableDB](https://github.com/facebook/rocksdb/wiki/How-to-backup-RocksDB%3F)
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* Implemented [TailingIterator](https://github.com/facebook/rocksdb/wiki/Tailing-Iterator), a special type of iterator that
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doesn't create a snapshot (can be used to read newly inserted data)
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and is optimized for doing sequential reads.
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* Added property block for table, which allows (1) a table to store
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its metadata and (2) end user to collect and store properties they
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are interested in.
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* Enabled caching index and filter block in block cache (turned off by default).
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* Supported error report when doing manual compaction.
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* Supported additional Linux platform flavors and Mac OS.
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* Put with `SliceParts` - Variant of `Put()` that gathers output like `writev(2)`
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* Bug fixes and code refactor for compatibility with upcoming Column
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Family feature.
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### Performance Improvements
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* 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]
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* Speeding up a way RocksDB deleted obsolete files - no longer listing the whole directory under a lock -- decrease in p99
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* 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
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* Optimized locking for `Get()` -- [1fdb3f](https://github.com/facebook/rocksdb/commit/1fdb3f7dc60e96394e3e5b69a46ede5d67fb976c) -- 1.5x QPS increase for some workloads
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* Cache speedup - [e8d40c3](https://github.com/facebook/rocksdb/commit/e8d40c31b3cca0c3e1ae9abe9b9003b1288026a9)
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* 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)
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* Lots of efforts to move malloc, memcpy and IO outside of locks
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31
INSTALL.md
31
INSTALL.md
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@ -17,15 +17,42 @@ libraries. You are on your own.
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## Supported platforms
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* **Linux**
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* **Linux - Ubuntu**
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* Upgrade your gcc to version at least 4.7 to get C++11 support.
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* Install gflags. First, try: `sudo apt-get install libgflags-dev`.
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* Install gflags. First, try: `sudo apt-get install libgflags-dev`
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If this doesn't work and you're using Ubuntu, here's a nice tutorial:
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(http://askubuntu.com/questions/312173/installing-gflags-12-04)
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* Install snappy. This is usually as easy as:
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`sudo apt-get install libsnappy-dev`.
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* Install zlib. Try: `sudo apt-get install zlib1g-dev`.
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* Install bzip2: `sudo apt-get install libbz2-dev`.
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* **Linux - CentOS**
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* Upgrade your gcc to version at least 4.7 to get C++11 support:
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`yum install gcc47-c++`
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* Install gflags:
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wget https://gflags.googlecode.com/files/gflags-2.0-no-svn-files.tar.gz
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tar -xzvf gflags-2.0-no-svn-files.tar.gz
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cd gflags-2.0
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./configure && make && sudo make install
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* Install snappy:
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wget https://snappy.googlecode.com/files/snappy-1.1.1.tar.gz
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tar -xzvf snappy-1.1.1.tar.gz
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cd snappy-1.1.1
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./configure && make && sudo make install
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* Install zlib:
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sudo yum install zlib
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sudo yum install zlib-devel
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* Install bzip2:
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sudo yum install bzip2
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sudo yum install bzip2-devel
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* **OS X**:
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* Install latest C++ compiler that supports C++ 11:
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* Update XCode: run `xcode-select --install` (or install it from XCode App's settting).
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@ -5,6 +5,11 @@
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# of patent rights can be found in the PATENTS file in the same directory.
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set -e
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if [ -z "$GIT" ]
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then
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GIT="git"
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fi
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# Print out the colored progress info so that it can be brainlessly
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# distinguished by users.
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function title() {
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@ -27,35 +32,13 @@ if [ $GIT_BRANCH != "master" ]; then
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echo "Error: Current branch is '$GIT_BRANCH', Please switch to master branch."
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fi
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# --Step 1: cutting new tag
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title "Adding new tag for this release ..."
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git tag -a "$ROCKSDB_VERSION.fb" -m "Rocksdb $ROCKSDB_VERSION"
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$TAG="$ROCKSDB_VERSION.fb"
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$GIT tag -a "$TAG" -m "Rocksdb $ROCKSDB_VERSION"
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# Setting up the proxy for remote repo access
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export http_proxy=http://172.31.255.99:8080
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export https_proxy="$http_proxy";
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title "Pushing new tag to remote repo ..."
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proxycmd.sh git push origin --tags
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$GIT push origin --tags
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# --Step 2: Update README.fb
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title "Updating the latest version info in README.fb ..."
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sed -i "s/Latest release is [0-9]\+.[0-9]\+.fb/Latest release is $ROCKSDB_VERSION.fb/" README.fb
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git commit README.fb -m "update the latest version in README.fb to $ROCKSDB_VERSION"
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proxycmd.sh git push
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# --Step 3: Prepare this repo for 3rd release
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title "Cleaning up repo ..."
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make clean
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git clean -fxd
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title "Generating the build info ..."
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# Comment out the call of `build_detection_version` so that the SHA number and build date of this
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# release will remain constant. Otherwise everytime we run "make" util/build_version.cc will be
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# overridden.
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sed -i 's/^\$PWD\/build_tools\/build_detect_version$//' build_tools/build_detect_platform
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# Generate util/build_version.cc
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build_tools/build_detect_version
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title "Done!"
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title "Tag $TAG is pushed to github; if you want to delete it, please run"
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title "git tags -d $TAG && git push origin :refs/tags/$TAG"
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@ -23,6 +23,7 @@
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#include <set>
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#include <vector>
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#include <deque>
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#include <atomic>
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#include "db/dbformat.h"
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#include "db/version_edit.h"
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#include "port/port.h"
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@ -252,17 +252,15 @@ class FileManager : public EnvWrapper {
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return s;
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}
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std::vector<int64_t> positions;
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auto pos = metadata.find(" crc32 ");
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auto pos = metadata.find("private");
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if (pos == std::string::npos) {
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return Status::Corruption("private file is expected");
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}
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pos = metadata.find(" crc32 ", pos + 6);
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if (pos == std::string::npos) {
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return Status::Corruption("checksum not found");
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}
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do {
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positions.push_back(pos);
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pos = metadata.find(" crc32 ", pos + 6);
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} while (pos != std::string::npos);
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pos = positions[rnd_.Next() % positions.size()];
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if (metadata.size() < pos + 7) {
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return Status::Corruption("bad CRC32 checksum value");
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}
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