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From "Olga Natkovich (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-856) PERFORMANCE: reduce number of replicas
Date Fri, 19 Jun 2009 00:19:07 GMT

    [ https://issues.apache.org/jira/browse/PIG-856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721577#action_12721577
] 

Olga Natkovich commented on PIG-856:
------------------------------------

If a job fails, the store connected to this job will fail as well. Pig has no retries beyond
what hadoop provides. That's why no replication seems a little risky but I want to see what
the perf difference is and whether it is worth the risk.

> PERFORMANCE: reduce number of replicas
> --------------------------------------
>
>                 Key: PIG-856
>                 URL: https://issues.apache.org/jira/browse/PIG-856
>             Project: Pig
>          Issue Type: Improvement
>    Affects Versions: 0.3.0
>            Reporter: Olga Natkovich
>
> Currently Pig uses the default number of replicas between MR jobs. Currently, the number
is 3. Given the temp nature of the data, we should never need more than 2 and should explicitely
set it to improve performance and to be nicer to the name node.

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