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From "Jens Rabe (JIRA)" <j...@apache.org>
Subject [jira] [Moved] (HADOOP-11561) It should be possible to chain-load multiple MapFiles on the fly and read the records in an ascending order
Date Sat, 07 Feb 2015 11:57:34 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-11561?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jens Rabe moved MAPREDUCE-6218 to HADOOP-11561:
-----------------------------------------------

        Key: HADOOP-11561  (was: MAPREDUCE-6218)
    Project: Hadoop Common  (was: Hadoop Map/Reduce)

> It should be possible to chain-load multiple MapFiles on the fly and read the records
in an ascending order
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-11561
>                 URL: https://issues.apache.org/jira/browse/HADOOP-11561
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Jens Rabe
>            Priority: Minor
>              Labels: mapfile
>   Original Estimate: 96h
>  Remaining Estimate: 96h
>
> In a scenario where there are many MapFiles which all share the same key/value types,
e.g., when dealing with measured data from sensors, it should be possible to chain-load multiple
MapFiles. That means, there should be a reader which can be supplied with one or more directories
containing MapFiles, and it should be possible to read the records of all files in order.



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