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来看下copyTable的一些使用参数：
- Usage: CopyTable [general options] [--starttime=X] [--endtime=Y] [--new.name=NEW] [--peer.adr=ADR] <tablename>
- Options:
- rs.class hbase.regionserver.class of the peer cluster
- specify if different from current cluster
- rs.impl hbase.regionserver.impl of the peer cluster
- startrow the start row
- stoprow the stop row
- starttime beginning of the time range (unixtime in millis)
- without endtime means from starttime to forever
- endtime end of the time range. Ignored if no starttime specified.
- 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.zookeeer.quorum:hbase.zookeeper.client.port:zookeeper.znode.parent
- families comma-separated list of families to copy
- To copy from cf1 to cf2, give sourceCfName:destCfName.
- To keep the same name, just give "cfName"
- all.cells also copy delete markers and deleted cells
- Args:
- tablename Name of the table to copy
- Examples:
- To copy '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 --families=myOldCf:myNewCf,cf2,cf3 TestTable
- For performance consider the following general options:
- -Dhbase.client.scanner.caching=100
- -Dmapred.map.tasks.speculative.execution=false
从上面参数，可以看出，copyTable支持设定需要复制的表的时间范围，cell的版本，也可以指定列簇，设定从集群的地址，起始/结束行键等。参数还是很灵活的。
copyTable支持如下几个场景： （编辑：西安站长网）
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