[jira] [Created] (HBASE-8074) Consolidate map-side features across mapreduce tools into a single place

["Nick Dimiduk (JIRA)" <ji...@apache.org>]

Nick Dimiduk created HBASE-8074:
-----------------------------------

             Summary: 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: Improvement
          Components: mapreduce, Usability
            Reporter: 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).

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira