Hi May, Not sure which hadoop deployment you use (Cloudera/HortonWorks/Apache?), but hadoop wiki - http://wiki.apache.org/hadoop/ can help For tracing IO logs, check your map/reduce flow – Output Collector/Reporter/Context.To get understanding of filesystem IO refer source under o.a.h.fs.* and possibly o.a.h.io.*
Thanks Rekha From: Li Shengmei <[email protected]<mailto:[email protected]>> Reply-To: <[email protected]<mailto:[email protected]>> Date: Wed, 29 Aug 2012 17:38:34 +0800 To: <[email protected]<mailto:[email protected]>> Subject: About the log record in hadoop Hi, all I want to do some study on the log of hadoop. I intend to konw how hadoop record the IO in the logs. Does anyone do related work and give some suggestions? Which part of hadoop source codes should be read carefully? Thanks, May
