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HBASE-13196 Add info about default number of versions when using the export tool

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Misty Stanley-Jones 2015-03-11 13:20:06 +10:00
parent 09e9c92d76
commit 142e36e7de
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src/main/asciidoc/_chapters/ops_mgt.adoc
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@ -412,6 +412,8 @@ Invoke via:
$ bin/hbase org.apache.hadoop.hbase.mapreduce.Export <tablename> <outputdir> [<versions> [<starttime> [<endtime>]]]
----
By default, the `Export` tool only exports the newest version of a given cell, regardless of the number of versions stored. To export more than one version, replace *_<versions>_* with the desired number of versions.
Note: caching for the input Scan is configured via `hbase.client.scanner.caching` in the job configuration.
=== Import
@ -580,6 +582,8 @@ It will run the mapreduce all in a single process but it will run faster if you
$ bin/hbase org.apache.hadoop.hbase.mapreduce.RowCounter <tablename> [<column1> <column2>...]
----
RowCounter only counts one version per cell.
Note: caching for the input Scan is configured via `hbase.client.scanner.caching` in the job configuration.
HBase ships another diagnostic mapreduce job called link:http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/CellCounter.html[CellCounter].