HBase中的拷贝表功能，HBase拷贝表功能

HBase中的拷贝表功能，HBase拷贝表功能

在使用HBase时，建立表的记录数目很多，想对表进行split操作，但又想以一个大的region来进行比较。所以想到拷贝表。找找命令，HBase有拷贝表的命令：CopyTable

CopyTable is a utility that can copy part or of all of a table, either to the same cluster or another cluster. The target table must first exist. The usage is as follows:

$ bin/hbase org.apache.hadoop.hbase.mapreduce.CopyTable [--starttime=X] [--endtime=Y] [--new.name=NEW] [--peer.adr=ADR] tablename

Options:

• starttime Beginning of the time range. Without endtime means starttime to forever.
• endtime End of the time range. Without endtime means starttime to forever.
• versions Number of cell versions to copy.
• new.name New table's name.
• peer.adr Address of the peer cluster given in the format hbase.zookeeper.quorum:hbase.zookeeper.client.port:zookeeper.znode.parent
• families Comma-separated list of ColumnFamilies to copy.
• all.cells Also copy delete markers and uncollected deleted cells (advanced option).

Args:

• tablename Name of table to copy.

Example of copying 'TestTable' to a cluster that uses replication for a 1 hour window:

$ bin/hbase org.apache.hadoop.hbase.mapreduce.CopyTable
--starttime=1265875194289 --endtime=1265878794289
--peer.adr=server1,server2,server3:2181:/hbase TestTable

注意：若用到--new.name =xxx,首先这个新表要之前就被定义。