works

performance seems about the same as leveldb for insert entries

weed/filer/rocksdb/README.md

@@ -0,0 +1,38 @@
+# 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
+
+```