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+# Prepare the compilation environment on linux
+- sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+- sudo apt-get update -qq
+- sudo apt-get install gcc-6 g++-6 libsnappy-dev zlib1g-dev libbz2-dev -qq
+- export CXX="g++-6" CC="gcc-6"
+
+- wget https://launchpad.net/ubuntu/+archive/primary/+files/libgflags2_2.0-1.1ubuntu1_amd64.deb
+- sudo dpkg -i libgflags2_2.0-1.1ubuntu1_amd64.deb
+- wget https://launchpad.net/ubuntu/+archive/primary/+files/libgflags-dev_2.0-1.1ubuntu1_amd64.deb
+- sudo dpkg -i libgflags-dev_2.0-1.1ubuntu1_amd64.deb
+
+# Prepare the compilation environment on mac os
+```
+brew install snappy
+```
+
+# install rocksdb:
+```
+ export ROCKSDB_HOME=/Users/chris/dev/rocksdb
+
+ git clone https://github.com/facebook/rocksdb.git $ROCKSDB_HOME
+ pushd $ROCKSDB_HOME
+ make clean
+ make install-static
+ popd
+```
+
+# install gorocksdb
+
+```
+export CGO_CFLAGS="-I$ROCKSDB_HOME/include"
+export CGO_LDFLAGS="-L$ROCKSDB_HOME -lrocksdb -lstdc++ -lm -lz -lbz2 -lsnappy -llz4 -lzstd"
+
+go get github.com/tecbot/gorocksdb
+```
+# compile with rocksdb
+
+```
+cd ~/go/src/github.com/chrislusf/seaweedfs/weed
+go install -tags rocksdb
+```