Examples of ReplicationAdmin

org.apache.hadoop.hbase.client.replication.ReplicationAdmin

This class provides the administrative interface to HBase cluster replication. In order to use it, the cluster and the client using ReplicationAdmin must be configured with hbase.replication set to true.

Adding a new peer results in creating new outbound connections from every region server to a subset of region servers on the slave cluster. Each new stream of replication will start replicating from the beginning of the current HLog, meaning that edits from that past will be replicated.

Removing a peer is a destructive and irreversible operation that stops all the replication streams for the given cluster and deletes the metadata used to keep track of the replication state.

Enabling and disabling peers is currently not supported.

As cluster replication is still experimental, a kill switch is provided in order to stop all replication-related operations, see {@link #setReplicating(boolean)}. When setting it back to true, the new state of all the replication streams will be unknown and may have holes. Use at your own risk.

To see which commands are available in the shell, type replication.

Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

    mimicSyncUpAfterPut();


  }


  private void setupReplication() throws Exception {
    ReplicationAdmin admin1 = new ReplicationAdmin(conf1);
    ReplicationAdmin admin2 = new ReplicationAdmin(conf2);


    HBaseAdmin ha = new HBaseAdmin(conf1);
    ha.createTable(t1_syncupSource);
    ha.createTable(t2_syncupSource);
    ha.close();


    ha = new HBaseAdmin(conf2);
    ha.createTable(t1_syncupTarget);
    ha.createTable(t2_syncupTarget);
    ha.close();


    // Get HTable from Master
    ht1Source = new HTable(conf1, t1_su);
    ht1Source.setWriteBufferSize(1024);
    ht2Source = new HTable(conf1, t2_su);
    ht1Source.setWriteBufferSize(1024);


    // Get HTable from Peer1
    ht1TargetAtPeer1 = new HTable(conf2, t1_su);
    ht1TargetAtPeer1.setWriteBufferSize(1024);
    ht2TargetAtPeer1 = new HTable(conf2, t2_su);
    ht2TargetAtPeer1.setWriteBufferSize(1024);


    /**
     * set M-S : Master: utility1 Slave1: utility2
     */
    admin1.addPeer("1", utility2.getClusterKey());


    admin1.close();
    admin2.close();
  }

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

    mimicSyncUpAfterPut();


  }


  private void setupReplication() throws Exception {
    ReplicationAdmin admin1 = new ReplicationAdmin(conf1);
    ReplicationAdmin admin2 = new ReplicationAdmin(conf2);


    HBaseAdmin ha = new HBaseAdmin(conf1);
    ha.createTable(t1_syncupSource);
    ha.createTable(t2_syncupSource);
    ha.close();


    ha = new HBaseAdmin(conf2);
    ha.createTable(t1_syncupTarget);
    ha.createTable(t2_syncupTarget);
    ha.close();


    // Get HTable from Master
    ht1Source = new HTable(conf1, t1_su);
    ht1Source.setWriteBufferSize(1024);
    ht2Source = new HTable(conf1, t2_su);
    ht1Source.setWriteBufferSize(1024);


    // Get HTable from Peer1
    ht1TargetAtPeer1 = new HTable(conf2, t1_su);
    ht1TargetAtPeer1.setWriteBufferSize(1024);
    ht2TargetAtPeer1 = new HTable(conf2, t2_su);
    ht2TargetAtPeer1.setWriteBufferSize(1024);


    /**
     * set M-S : Master: utility1 Slave1: utility2
     */
    admin1.addPeer("1", utility2.getClusterKey());


    admin1.close();
    admin2.close();
  }

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

    MiniZooKeeperCluster miniZK = utility1.getZkCluster();
    // Have to reget conf1 in case zk cluster location different
    // than default
    conf1 = utility1.getConfiguration();  
    zkw1 = new ZooKeeperWatcher(conf1, "cluster1", null, true);
    admin = new ReplicationAdmin(conf1);
    LOG.info("Setup first Zk");


    // Base conf2 on conf1 so it gets the right zk cluster.
    conf2 = HBaseConfiguration.create(conf1);
    conf2.set(HConstants.ZOOKEEPER_ZNODE_PARENT, "/2");

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

    }
  }


  private void addPeer(String id, int masterClusterNumber,
      int slaveClusterNumber) throws Exception {
    ReplicationAdmin replicationAdmin = null;
    try {
      replicationAdmin = new ReplicationAdmin(
          configurations[masterClusterNumber]);
      replicationAdmin.addPeer(id,
          utilities[slaveClusterNumber].getClusterKey());
    } finally {
      close(replicationAdmin);
    }
  }

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

      close(replicationAdmin);
    }
  }


  private void disablePeer(String id, int masterClusterNumber) throws Exception {
    ReplicationAdmin replicationAdmin = null;
    try {
      replicationAdmin = new ReplicationAdmin(
          configurations[masterClusterNumber]);
      replicationAdmin.disablePeer(id);
    } finally {
      close(replicationAdmin);
    }
  }

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

      close(replicationAdmin);
    }
  }


  private void enablePeer(String id, int masterClusterNumber) throws Exception {
    ReplicationAdmin replicationAdmin = null;
    try {
      replicationAdmin = new ReplicationAdmin(
          configurations[masterClusterNumber]);
      replicationAdmin.enablePeer(id);
    } finally {
      close(replicationAdmin);
    }
  }

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

  public void testMultiSlaveReplication() throws Exception {
    LOG.info("testCyclicReplication");
    MiniHBaseCluster master = utility1.startMiniCluster();
    utility2.startMiniCluster();
    utility3.startMiniCluster();
    ReplicationAdmin admin1 = new ReplicationAdmin(conf1);


    new HBaseAdmin(conf1).createTable(table);
    new HBaseAdmin(conf2).createTable(table);
    new HBaseAdmin(conf3).createTable(table);
    HTable htable1 = new HTable(conf1, tableName);
    htable1.setWriteBufferSize(1024);
    HTable htable2 = new HTable(conf2, tableName);
    htable2.setWriteBufferSize(1024);
    HTable htable3 = new HTable(conf3, tableName);
    htable3.setWriteBufferSize(1024);
    
    admin1.addPeer("1", utility2.getClusterKey());


    // put "row" and wait 'til it got around, then delete
    putAndWait(row, famName, htable1, htable2);
    deleteAndWait(row, htable1, htable2);
    // check it wasn't replication to cluster 3
    checkRow(row,0,htable3);


    putAndWait(row2, famName, htable1, htable2);


    // now roll the region server's logs
    new HBaseAdmin(conf1).rollHLogWriter(master.getRegionServer(0).getServerName().toString());
    // after the log was rolled put a new row
    putAndWait(row3, famName, htable1, htable2);


    admin1.addPeer("2", utility3.getClusterKey());


    // put a row, check it was replicated to all clusters
    putAndWait(row1, famName, htable1, htable2, htable3);
    // delete and verify
    deleteAndWait(row1, htable1, htable2, htable3);

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

    MiniZooKeeperCluster miniZK = utility1.getZkCluster();
    // Have to reget conf1 in case zk cluster location different
    // than default
    conf1 = utility1.getConfiguration();  
    zkw1 = new ZooKeeperWatcher(conf1, "cluster1", null, true);
    admin = new ReplicationAdmin(conf1);
    LOG.info("Setup first Zk");


    // Base conf2 on conf1 so it gets the right zk cluster.
    conf2 = HBaseConfiguration.create(conf1);
    conf2.set(HConstants.ZOOKEEPER_ZNODE_PARENT, "/2");

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

  public void testCyclicReplication() throws Exception {
    LOG.info("testCyclicReplication");
    utility1.startMiniCluster();
    utility2.startMiniCluster();
    utility3.startMiniCluster();
    ReplicationAdmin admin1 = new ReplicationAdmin(conf1);
    ReplicationAdmin admin2 = new ReplicationAdmin(conf2);
    ReplicationAdmin admin3 = new ReplicationAdmin(conf3);


    new HBaseAdmin(conf1).createTable(table);
    new HBaseAdmin(conf2).createTable(table);
    new HBaseAdmin(conf3).createTable(table);
    HTable htable1 = new HTable(conf1, tableName);
    htable1.setWriteBufferSize(1024);
    HTable htable2 = new HTable(conf2, tableName);
    htable2.setWriteBufferSize(1024);
    HTable htable3 = new HTable(conf3, tableName);
    htable3.setWriteBufferSize(1024);
    
    admin1.addPeer("1", utility2.getClusterKey());
    admin2.addPeer("1", utility3.getClusterKey());
    admin3.addPeer("1", utility1.getClusterKey());


    // put "row" and wait 'til it got around
    putAndWait(row, famName, htable1, htable3);
    // it should have passed through table2
    check(row,famName,htable2);

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Examples of org.apache.hadoop.hbase.client.replication.ReplicationAdmin

  public void testSimplePutDelete() throws Exception {
    LOG.info("testSimplePutDelete");
    utility1.startMiniCluster();
    utility2.startMiniCluster();


    ReplicationAdmin admin1 = new ReplicationAdmin(conf1);
    ReplicationAdmin admin2 = new ReplicationAdmin(conf2);


    new HBaseAdmin(conf1).createTable(table);
    new HBaseAdmin(conf2).createTable(table);
    HTable htable1 = new HTable(conf1, tableName);
    htable1.setWriteBufferSize(1024);
    HTable htable2 = new HTable(conf2, tableName);
    htable2.setWriteBufferSize(1024);


    // set M-M
    admin1.addPeer("1", utility2.getClusterKey());
    admin2.addPeer("1", utility1.getClusterKey());


    // add rows to both clusters,
    // make sure they are both replication
    putAndWait(row, famName, htable1, htable2);
    putAndWait(row1, famName, htable2, htable1);

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