Copying Data
About this task
NOTE
The Apache CopyTable tool launches a MapReduce application. The nodes on your
cluster must have the correct version of the mapr-hbase
package
installed. To ensure that your existing HBase applications and workflow work properly,
install the mapr-hbase
package that provides the same version number of
HBase as your existing Apache HBase. Launch the CopyTable tool with the following command, specifying the full destination
path of the table with the
--new.name
parameter:
hbase org.apache.hadoop.hbase.mapreduce.CopyTable
-Dhbase.zookeeper.quorum=<ZooKeeper IP Address>
-Dhbase.zookeeper.property.clientPort=5181 --new.name=/user/john/foo/mytable01
This example migrates the existing Apache HBase table mytable01
to the
HPE Ezmeral Data Fabric Database tables
/user/john/foo/mytable01
. On the node in the HPE Ezmeral Data Fabric cluster
where you will launch the CopyTable tool, modify the value of the
hbase.zookeeper.quorum
property in the
hbase-site.xml
file to point at a ZooKeeper node in the source
cluster. Alternately, you can specify the value for the
hbase.zookeeper.quorum
property from the command line. This example
specifies the value in the command line.
Procedure
-
Create the destination table. This example uses the HBase shell. The maprcli and the
Control System are also viable
methods.
[user@host]$ hbase shell HBase Shell; enter 'help<RETURN>' for list of supported commands. Type "exit<RETURN>" to leave the HBase Shell hbase(main):001:0> create '/user/john/foo/mytable01', 'usernames', 'userpath' 0 row(s) in 0.2040 seconds
-
Exit the HBase shell.
hbase(main):002:0> exit [user@host]
-
From the command line, use the CopyTable tool to migrate data.
[user@host] hbase org.apache.hadoop.hbase.mapreduce.CopyTable -Dhbase.zookeeper.quorum=zknode1,zknode2,zknode3 --new.name=/user/john/foo/mytable01 mytable01