Prerequisite

Because benchMark use the headers and libs of (json, yaml-cpp, rados, rbd), and the makefile of benchMark use the libs directly, 
so we need to ensure program can find all these libs from system path, (/usr/include, /usr/lib/) 
   -ljson_linux -lrados -lrbd -lyaml-cpp
1. install yaml-cpp
   download yaml-cpp from https://code.google.com/p/yaml-cpp/downloads/detail?name=yaml-cpp-0.5.1.tar.gz
   install accroding to 'install.txt' 
   
   you may have below problem on Centos 6.5:
   ```
   The imported target "boost_date_time-static" references the file

     "/usr/lib64/lib64/libboost_date_time.a"
   but this file does not exist. 
   ```
   just run"cmake .. -DBoost_NO_BOOST_CMAKE=ON"

scon is needed by jscon, so we should install scon first

2. install scon
   download scons from http://www.scons.org/
   tar -zxvf scons-2.0.1.tar.gz
   set env
   export MYSCONS= /path/to/scon/
   export SCONS_LIB_DIR=$MYSCONS/engine 

3. install jscon
   download from http://sourceforge.net/projects/jsoncpp/
   tar zxvf jsoncpp-src-0.5.0.tar.gz 
   cd jsoncpp-src-0.5.0
   python $MYSCONS/script/scons platform=linux-gcc
   cp -r include/json  /usr/include
   
   ** my gcc version is 4.4.7, so repalce it with your gcc version **
   cp libs/linux-gcc-4.4.7/*  /usr/lib/
   ln -s /usr/lib/libjson_linux-gcc-4.4.7_libmt.so /usr/lib/libjson_linux