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changes.mady.by.user Deepak Wadhwani

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changes.mady.by.user Sagar Kapare

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  1. Stop all CDAP programs on the master cluster
  2. Stop CDAP on the master cluster
  3. Copy any HDFS files that have not yet been copied using either your distro's solution or distcp

  4. Run the replication status tool to get cluster state:

    Code Block
    master$ cdap run co.cask.cdap.data.tools.ReplicationStatusTool -m -o /tmp/master_state

  5. Copy the master state onto your slave cluster:

    Code Block
    master$ scp /tmp/master_state <slave>:/tmp/master_state

  6. Verify replication has copied the required data onto the slave:

    Code Block
    slave$ cdap run co.cask.cdap.data.tools.ReplicationStatusTool -i /tmp/master_state
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Master and Slave Checksums match. HDFS Replication is complete.
HBase Replication is complete.

  7. Run Hive's metatool to update locations for Hive tables:

    Code Block
    slave$ hive --service metatool -updateLocation hdfs://[masterslave-namenode-host]:[masterslave-namenode-port] hdfs://[slavemaster-namenode-host]:[slavemaster-namenode-port] -tablePropKey avro.schema.url -serdePropKey avro.schema.url

  8. Start CDAP on the slave:

    Code Block
    slave$ cdap master start

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