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

Package org.apache.hadoop.hbase.client.replication

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

    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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    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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    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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