环境：Ubuntu 12.04, RocksDB, pyrocksdb
RocksDB是FB基于google的LevelDB基础上改良的键值对数据库，类似于memcache和redis，支持RAM, Flash, Disk存储，写速度快过LevelDB 10倍左右， 听起来有点高大上的感觉，可参考https://github.com/facebook/rocksdb/wiki/Performance-Benchmarks 。不管这么多了，先安装试用下
安装步骤：
rocksdb安装：
sudo git clone https://github.com/facebook/rocksdb.git
cd rocksdb
vi Makefile
将这一行 OPT += -O2 -fno-omit-frame-pointer -momit-leaf-frame-pointer
修改为 OPT += -O2 -lrt -fno-omit-frame-pointer -momit-leaf-frame-pointer
在~/.bashrc中增加 export LD_PRELOAD=/lib/x86_64-linux-gnu/librt.so.1，并使变量生效source ~/.bashrc
(这两步用于解决这个问题 ” undefined symbol: clock_gettime”)
sudo git checkout 2.8.fb
sudo make shared_lib
cd ..
sudo chown jerry:jerry rocksdb -Rf
cd rocksdb
sudo cp librocksdb.so /usr/local/lib
sudo mkdir -p /usr/local/include/rocksdb/
sudo cp -r ./include/* /usr/local/include/
(这三步解决这个问题 “ Fatal error: rocksdb/slice.h: No such file or directory “)
pyrocksdb安装：
sudo pip install “Cython>=0.20”
sudo pip install git+git://github.com/stephan-hof/pyrocksdb.git@v0.2.1
至些安装成功
进入pyrocksdb环境
jerry@hq:/u01/rocksdb$ python
Python 2.7.3 (default, Sep 26 2013, 20:03:06)
[GCC 4.6.3] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.
>>> import rocksdb
>>> db = rocksdb.DB(“test.db”, rocksdb.Options(create_if_missing=True))
>>> db.put(b“key1”, b“v1”)
>>> db.put(b“key2”, b“v2”)
>>> db.get(b”key1″)
‘v1’
