ab : Apache HTTP Server Benchmarking tools 의 약자로 아파치서버의 응답속도를 측정하는 툴이다. [사용 옵션들] Options are: -n requests Number of requests to perform (요청수) -c concurrency Number of multiple requests to make (동시접속) -t timelimit Seconds to max. wait for responses (시간제한) -p postfile File containing data to POST -T content-type Content-type header for POSTing -v verbosity How much troubleshooting info to print -w..