blocks|key|4680931|text|假设您想要在同一群集上复制表，您可以在hbase+shell中使用HBase快照|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4680932|snapshot+'sourceTable',+'sourceTable-snapshot'
clone_snapshot+'sourceTable-snapshot',+'newTable'|code-block|syntax|javascript|4680933|entityMap^0|J|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Assuming you want to copy the table on the same cluster you can use HBase snapshots
in the <code>hbase shell</code> you can

<pre><code>snapshot 'sourceTable', 'sourceTable-snapshot'
clone_snapshot 'sourceTable-snapshot', 'newTable'
</code></pre>

blocks|key|4681055|text|在复制HBase表时，CopyTable命令非常方便。按照以下方式使用它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4681056|hbase+org.apache.hadoop.hbase.mapreduce.CopyTable+--new.name=Y+X;|code-block|syntax|javascript|4681057|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

CopyTable command is very handy to replicate HBase Tables. Use it in the following way:

<pre><code>hbase org.apache.hadoop.hbase.mapreduce.CopyTable --new.name=Y X;
</code></pre>

blocks|key|174977|text|使用hbase+shell|type|unstyled|depth|inlineStyleRanges|entityRanges|data|174978|确保在hbase-site.xml中启用快照|174979|++<property>
+++++<name>hbase.snapshot.enabled</name>
+++++<value>true</value>
++++</property>|code-block|syntax|javascript|174980|hbase>快照'x‘，'snapshot_x’hbase>+clone_snapshot+'snapshot_x‘，'another_x’|174981|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

use hbase shell 
1. make sure you enbale snapshot in hbase-site.xml 

<pre><code> &lt;property&gt;
 &lt;name&gt;hbase.snapshot.enabled&lt;/name&gt;
 &lt;value&gt;true&lt;/value&gt;
 &lt;/property&gt;
</code></pre>

2. hbase> snapshot 'x' ,'snapshot_x' 
3. hbase> clone_snapshot 'snapshot_x' ,'another_x'

blocks|key|175039|text|在hbase+shell中检查版本；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|175040|hbase(main):001:0>+version
0.90.4,+r1150278,+Sun+Jul+24+15:53:29+PDT+2011|code-block|syntax|javascript|175041|如果是0.94.6的旧版本，则应使用mapredeuce作业。快照从0.94.6开始可用。如果快照高于0.94.6，则可以使用toby941+answer或其中之一|offset|length|175042|a)|175043|./hbase+org.apache.hadoop.hbase.mapreduce.CopyTable
Usage:+CopyTable+[--rs.class=CLASS]+[--rs.impl=IMPL]+[--starttime=X]+[--endtime=Y]+[--new.name=NEW]+[--peer.adr=ADR]+<tablename>|175044|B-1)|175045|./hbase+org.apache.hadoop.hbase.mapreduce.Export
Usage:+Export+[-D+<property=value>]*+<tablename>+<outputdir>+[<versions>+[<starttime>+[<endtime>]]]|175046|B-2)然后使用您想要的名称导入|175047|./hbase+org.apache.hadoop.hbase.mapreduce.Import
Usage:+Import+<tablename>+<inputdir>|175048|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/20910323/how-to-copy-an-existing-hbase-table/20985829#20985829^0|0|0|1R|E|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|16|8|@]|9|@$I|17|J|18|1|19]]|A|$]]|$1|K|3|L|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|1B|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1E|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|1F|8|@]|9|@]|A|$E|F]]|$1|W|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]]]

In hbase shell check version;

<pre><code>hbase(main):001:0&gt; version
0.90.4, r1150278, Sun Jul 24 15:53:29 PDT 2011
</code></pre>

if older version of 0.94.6 then you should use mapredeuce jobs.
snapshots are available since 0.94.6
if it is above, you may use <a href="https://stackoverflow.com/questions/20910323/how-to-copy-an-existing-hbase-table/20985829#20985829">toby941 answer</a>
or you can use one of these

A)

<pre><code>./hbase org.apache.hadoop.hbase.mapreduce.CopyTable
Usage: CopyTable [--rs.class=CLASS] [--rs.impl=IMPL] [--starttime=X] [--endtime=Y] [--new.name=NEW] [--peer.adr=ADR] &lt;tablename&gt;
</code></pre>

B-1)

<pre><code>./hbase org.apache.hadoop.hbase.mapreduce.Export
Usage: Export [-D &lt;property=value&gt;]* &lt;tablename&gt; &lt;outputdir&gt; [&lt;versions&gt; [&lt;starttime&gt; [&lt;endtime&gt;]]]
</code></pre>

B-2)
then import with whatever name you want

<pre><code>./hbase org.apache.hadoop.hbase.mapreduce.Import
Usage: Import &lt;tablename&gt; &lt;inputdir&gt;
</code></pre>

blocks|key|4680869|text|根据HBase文档，这里(1，2)是选项。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4680870|entityMap|0|LINK|mutability|MUTABLE|url|http://hbase.apache.org/book/ops_mgt.html#copytable|1|http://hbase.apache.org/book/mapreduce.example.html#mapreduce.example.readwrite^0|D|1|0|F|1|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

According to the HBase documentations here (<a href="http://hbase.apache.org/book/ops_mgt.html#copytable" rel="nofollow">1</a>, <a href="http://hbase.apache.org/book/mapreduce.example.html#mapreduce.example.readwrite" rel="nofollow">2</a>) are the options.

blocks|key|174909|text|这将会起作用..|type|unstyled|depth|inlineStyleRanges|entityRanges|data|174910|hbase+org.apache.hadoop.hbase.mapreduce.Export+tableA+/hbase_export/tableA

hbase+org.apache.hadoop.hbase.mapreduce.Import+/hbase_export/tableA+tableAcopy|code-block|syntax|javascript|174911|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

this will work..

<pre><code>hbase org.apache.hadoop.hbase.mapreduce.Export tableA /hbase_export/tableA

hbase org.apache.hadoop.hbase.mapreduce.Import /hbase_export/tableA tableAcopy
</code></pre>

blocks|key|175022|text|如果您使用的是较旧版本的hbase+https://issues.apache.org/jira/browse/HBASE-8742，则快照方法可能不起作用。在这种情况下，您可能需要手动复制hbase模式，然后应用快照或更好的应用程序来升级到修复版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|175023|entityMap|0|LINK|mutability|MUTABLE|url|https://issues.apache.org/jira/browse/HBASE-8742^0|I|1C|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Snapshot methodology may not work if you are on older version of hbase
<a href="https://issues.apache.org/jira/browse/HBASE-8742" rel="nofollow">https://issues.apache.org/jira/browse/HBASE-8742</a>
. In that case you may have to manually copy hbase schema and then apply snapshot or better to upgrade to fixed version.

I have a Hbase table X and I want to create an exact copy of it and name it Y. Could someone let me know how it is possible?

Thanks

How to copy an existing hbase table

HBase

我有一个Hbase表X，我想创建一个精确的副本并将其命名为Y。有人能告诉我这是如何实现的吗？谢谢

问如何复制已有的hbase表
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