It stresses the filesystem with multiple threads performing random reads, writes and rewrites in order to get a realistic idea of the scalability and the concurrency a system can handle.
Download blogbench from here and type the following command to compile and install blogbench
# tar xvzf blogbench-1.1.tar.gz
# cd blogbench-1.1
# make install
The minimal way to run the test is to just give the path to an *empty* and writable directory:
# blogbench -d /path/to/the/directoryBlogbench will start the required threads and the test will run during 5 minutes. A final "score" will then be given as an indication of read and write performance.