Hi, On Linux you can monitor système call of any process using: strace -p PIDofHDFSdatanode
It can be very verbose but the information will be there. Did you try metrics available in ambari or cloudera manager ? Regards Le mar. 20 août 2019 à 02:47, Daegyu Han <hdg9...@gmail.com> a écrit : > 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 >
