Hi all, I'm currently studying HDFS, and I want to analyze HDFS io latency.
I know that C / C ++ programs can use perf and ftrace under Linux to analyze user level and kernel level latency measurements and overhead. I would like to analyze the read io latency in HDFS to user level (HDFS) and system level (kernel I / O stack). Which way is the best? Thank you. ᐧ
