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Posted to mapreduce-issues@hadoop.apache.org by "piyush mukati (JIRA)" <ji...@apache.org> on 2017/09/05 05:15:02 UTC
[jira] [Commented] (MAPREDUCE-6893) MultipleOutputs to have
configuration overrides for a named output
[ https://issues.apache.org/jira/browse/MAPREDUCE-6893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16153116#comment-16153116 ]
piyush mukati commented on MAPREDUCE-6893:
------------------------------------------
I would like to volunteer for this. Will send a patch shortly.
> MultipleOutputs to have configuration overrides for a named output
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-6893
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6893
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Reporter: piyush mukati
> Priority: Minor
>
> To support the use-cases where we have to give different config for different named output.
> one use case may be that
> we need different schemas for different named output and schema is passed as config in Record Writer.
> or example:
> we have two named output "schema1" and "schema2"
> for schema1 we want the value of key "schema" as "int"
> while for schema2 it should be "string".
> so we can provide config as
> "multioutput.overrideKeys= schema"
> "multioutput. schema1.schema=int"
> "multioutput. schema2.schema=string"
> and while creating context in getContext
> config for schema1 will resolved to "schema=int"
> and for schema2 it will be "schema=string"
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