List of startDataNodes() Examples

Examples of startDataNodes()

org.apache.hadoop.dfs.MiniDFSCluster.startDataNodes()

Modify the config and start up the DataNodes. The info port for DataNodes is guaranteed to use a free port. @param conf the base configuration to use in starting the DataNodes. Thiswill be modified as necessary. @param numDataNodes Number of DataNodes to start; may be zero @param manageDfsDirs if true, the data directories for DataNodes will becreated and dfs.data.dir will be set in the conf @param operation the operation with which to start the DataNodes. If nullor StartupOption.FORMAT, then StartupOption.REGULAR will be used. @param racks array of strings indicating the rack that each DataNode is on @throws IllegalStateException if NameNode has been shutdown

org.apache.hadoop.hdfs.MiniDFSCluster.startDataNodes()

Modify the config and start up additional DataNodes. The info port for DataNodes is guaranteed to use a free port. Data nodes can run with the name node in the mini cluster or a real name node. For example, running with a real name node is useful when running simulated data nodes with a real name node. If minicluster's name node is null assume that the conf has been set with the right address:port of the name node. @param conf the base configuration to use in starting the DataNodes. Thiswill be modified as necessary. @param numDataNodes Number of DataNodes to start; may be zero @param manageDfsDirs if true, the data directories for DataNodes will becreated and dfs.data.dir will be set in the conf @param operation the operation with which to start the DataNodes. If nullor StartupOption.FORMAT, then StartupOption.REGULAR will be used. @param racks array of strings indicating the rack that each DataNode is on @param hosts array of strings indicating the hostnames for each DataNode @param simulatedCapacities array of capacities of the simulated data nodes @throws IllegalStateException if NameNode has been shutdown

org.apache.hadoop.hdfs.MiniDFSClusterWithNodeGroup.startDataNodes()

      }
      // write file1 on datanode1 with 1 replica
      UtilsForTests.writeFile(
          dfs.getNameNode(), conf, new Path(inDir + "/file1"), (short)1);
      // start another two datanodes (2 and 3)
      dfs.startDataNodes(conf, 2, true, null, rack2, nodeGroup2, hosts2, null);


      dfs.waitActive();
      // write two files with 3 replica, so each datanodes will have one replica
      // of file2 and file3
      UtilsForTests.writeFile(

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of startDataNodes()

Examples of org.apache.hadoop.hdfs.MiniDFSClusterWithNodeGroup.startDataNodes()