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From chia7...@apache.org
Subject hbase git commit: HBASE-18718 Document the coprocessor.Export
Date Tue, 19 Dec 2017 15:49:28 GMT
Repository: hbase
Updated Branches:
  refs/heads/branch-2 c5acfe64a -> 153ca756c


HBASE-18718 Document the coprocessor.Export


Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/153ca756
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/153ca756
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/153ca756

Branch: refs/heads/branch-2
Commit: 153ca756c35b079160dc451132847b904fda12f2
Parents: c5acfe6
Author: Chia-Ping Tsai <chia7712@gmail.com>
Authored: Sat Sep 9 15:16:14 2017 +0800
Committer: Chia-Ping Tsai <chia7712@gmail.com>
Committed: Tue Dec 19 23:49:14 2017 +0800

----------------------------------------------------------------------
 src/main/asciidoc/_chapters/ops_mgt.adoc | 46 ++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/hbase/blob/153ca756/src/main/asciidoc/_chapters/ops_mgt.adoc
----------------------------------------------------------------------
diff --git a/src/main/asciidoc/_chapters/ops_mgt.adoc b/src/main/asciidoc/_chapters/ops_mgt.adoc
index 723de85..7b0f89b 100644
--- a/src/main/asciidoc/_chapters/ops_mgt.adoc
+++ b/src/main/asciidoc/_chapters/ops_mgt.adoc
@@ -444,12 +444,56 @@ See Jonathan Hsieh's link:https://blog.cloudera.com/blog/2012/06/online-hbase-ba
 === Export
 
 Export is a utility that will dump the contents of table to HDFS in a sequence file.
-Invoke via:
+The Export can be run via a Coprocessor Endpoint or MapReduce. Invoke via:
 
+*mapreduce-based Export*
 ----
 $ bin/hbase org.apache.hadoop.hbase.mapreduce.Export <tablename> <outputdir>
[<versions> [<starttime> [<endtime>]]]
 ----
 
+*endpoint-based Export*
+----
+$ bin/hbase org.apache.hadoop.hbase.coprocessor.Export <tablename> <outputdir>
[<versions> [<starttime> [<endtime>]]]
+----
+
+*The Comparison of Endpoint-based Export And Mapreduce-based Export*
+|===
+||Endpoint-based Export|Mapreduce-based Export
+
+|HBase version requirement
+|2.0+
+|0.2.1+
+
+|Maven dependency
+|hbase-endpoint
+|hbase-mapreduce (2.0+), hbase-server(prior to 2.0)
+
+|Requirement before dump
+|mount the endpoint.Export on the target table
+|deploy the MapReduce framework
+
+|Read latency
+|low, directly read the data from region
+|normal, traditional RPC scan
+
+|Read Scalability
+|depend on number of regions
+|depend on number of mappers (see TableInputFormatBase#getSplits)
+
+|Timeout
+|operation timeout. configured by hbase.client.operation.timeout
+|scan timeout. configured by hbase.client.scanner.timeout.period
+
+|Permission requirement
+|READ, EXECUTE
+|READ
+
+|Fault tolerance
+|no
+|depend on MapReduce
+|===
+
+
 NOTE: To see usage instructions, run the command with no options. Available options include
 specifying column families and applying filters during the export.
 


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