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From "Jiaqi Tan (JIRA)" <>
Subject [jira] Updated: (CHUKWA-282) Demux should output detailed per-operation ClientTrace records
Date Tue, 09 Jun 2009 19:26:07 GMT


Jiaqi Tan updated CHUKWA-282:

    Attachment: CHUKWA-282.patch

ClientTraceProcessor adds an additional "actual_time" field to the ChukwaRecord for generating
ChukwaRecordKey of ClientTraceDetailed ChukwaRecords, and ClientTrace reducer generates additional
ClientTraceDetailed records.

> Demux should output detailed per-operation ClientTrace records
> --------------------------------------------------------------
>                 Key: CHUKWA-282
>                 URL:
>             Project: Hadoop Chukwa
>          Issue Type: Improvement
>          Components: Data Processors
>    Affects Versions: 0.2.0
>            Reporter: Jiaqi Tan
>            Assignee: Jiaqi Tan
>            Priority: Minor
>             Fix For: 0.2.0
>         Attachments: CHUKWA-282.patch
> Currently, the ClientTrace reducer in Demux summarizes client trace operations to produce
aggregate statistics for each type of operation (e.g. total bytes of local HDFS reads, total
bytes of local HDFS writes). However, more sophisticated algorithms and visualization will
need more detailed information such as amount of reads/writes to/from every pair of hosts.
The ClientTrace reducer should also output the unsummarized, raw ClientTrace data so they
can be used for analysis/visualization.

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