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From "Joshi, Rekha" <Rekha_Jo...@intuit.com>
Subject Re: About the log record in hadoop
Date Wed, 29 Aug 2012 11:40:53 GMT
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 <lishengmei@ict.ac.cn<mailto:lishengmei@ict.ac.cn>>
Reply-To: <user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
Date: Wed, 29 Aug 2012 17:38:34 +0800
To: <user@hadoop.apache.org<mailto:user@hadoop.apache.org>>
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


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