samuelliu805 / fsop Goto Github PK

#In Situ File Access Profiling

The goal for this tool is to track and vistualize file operations in a multi-threaded environment

I achieved this using strace and tested this using sysbench. By parsing the output I can visualize the file operations.

• Using sysbench: An example command for running sysbench is: sysbench --test=fileio --file-total-size=1MB --file-test-mode=rndwr --max-time=2 --max-requests=0 --file-block-size=4K --file-num=64 --num-threads=6 run I also tried using fio, but I found sysbench is a better tool in producing file operations.

• Running Strace: An example for running strace with time is: strace -T -o thread.txt sysbench --test=fileio --file-total-size=1MB --file-test-mode=rndwr --max-time=5 --max-requests=0 --file-block-size=4K --file-num=4 --num-threads=3 run The output file contains the information for all operations. The way I approach it is searching for open system call, and record all followings file operations (ie, read/write)with the same file descriptor number until close on that file descriptor is called.

The problem with this approach is that strace contains large operation overhead.

fix the bugs to recursively print the directory path so that we can vistualize it