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.zookeeper.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
  bulkload Write input into HFiles and bulk load to the destination table

Args:
  tablename Name of the table to copy

Examples:
  To copy 'TestTable' to a cluster that uses replication for a 1 hour window:
  $ 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 option:
  It is recommended that you set the following to >=100. A higher value uses   more memory but
  decreases the round trip time to the server and may increase performance.
  -Dhbase.client.scanner.caching=100
  The following should always be set to false, to prevent writing data twice,   which may produce
  inaccurate results.
  -Dmapreduce.map.speculative=false

hbase   org.apache.hadoop.hbase.mapreduce.CopyTable --peer.adr=Hmaster:2181:/hbase  --starttime=1576030486383   --endtime=1576030564291 student

hbase(main):009:0> snapshot   "student_new","student_new_snapshot"

hbase   org.apache.hadoop.hbase.snapshot.ExportSnapshot -snapshot   student_new_snapshot

-copy-from hdfs://hslave1:8020/hbase

-copy-to hdfs://qaslave1:8020/hbase

-mappers 20   -bandwidth 50

-chuser hadoop   -chgroup supergroup

hbase(main):007:0> restore_snapshot   "student_new_snapshot"

hbase org.apache.hadoop.hbase.mapreduce.LoadIncrementalHFiles   -Dhbase.mapreduce.bulkload.max.hfiles.perRegion.perFamily=1024 hdfs://slave1:8020/hbase/archive/data/default/student_new/868eb15b0143e4057dbfc906c6b2c22c   "student_new"