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https://issues.apache.org/jira/browse/HBASE-8074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nick Dimiduk reassigned HBASE-8074:
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Assignee: Nick Dimiduk
> Consolidate map-side features across mapreduce tools into a single place
> ------------------------------------------------------------------------
>
> Key: HBASE-8074
> URL: https://issues.apache.org/jira/browse/HBASE-8074
> Project: HBase
> Issue Type: Sub-task
> Components: mapreduce, Usability
> Reporter: Nick Dimiduk
> Assignee: Nick Dimiduk
>
> The mapreduce tools support a similar but divergent set of features for
> mapping over KeyValue data:
> * {{Export}} supports specifying a version-range window, application of a
> rowkey regex or prefix filter, and a "raw mode" that includes delete markers.
> * {{Import}} can apply an arbitrary filter and can also apply a "transform",
> renaming column families in the emitted KeyValues.
> * {{CopyTable}} allows specifying a version-range window, limiting to a
> fixed number of versions, a "raw mode", and column family transformation.
> * {{WALPlayer}} supports reading a time-range.
> * {{ImportTsv}} could incorporate a number of these features, especially the
> filter and transform capabilities, allowing a user to avoid implementing a
> custom mapper where the existing parser is sufficient, but for a slight
> massage of the data.
> The proposal is to create a single implementation for these features with a
> single configuration interface. Ideally, such an implementation would be
> exposed via the common utility classes as well (ie, IdentityTableMapper).
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