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From "paul sutter (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-195) transfer map output transfer with http instead of rpc
Date Fri, 05 May 2006 20:47:28 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-195?page=comments#action_12378132 ] 

paul sutter commented on HADOOP-195:
------------------------------------


ooops, i was wrong by a few orders of magnitude. 
but i was also right by a couple orders of magnitude

the best feature of the map/reduce approach is that you only have to make one thing fast,
and every program you write is fast.

and that one thing is sort.

so again,.. im very pleased that we're taking a look at the sort path!

once the copy phase is fixed, the next step is for the Yahoo guys to contribute David Cossock's
sort ;)

> transfer map output transfer with http instead of rpc
> -----------------------------------------------------
>
>          Key: HADOOP-195
>          URL: http://issues.apache.org/jira/browse/HADOOP-195
>      Project: Hadoop
>         Type: Improvement

>   Components: mapred
>     Versions: 0.2
>     Reporter: Owen O'Malley
>     Assignee: Owen O'Malley
>      Fix For: 0.3

>
> The data transfer of the map output should be transfered via http instead rpc, because
rpc is very slow for this application and the timeout behavior is suboptimal. (server sends
data and client ignores it because it took more than 10 seconds to be received.)

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