Hadoop配置机架感知(python脚

#!/usr/bin/Python
#-*-coding:UTF-8 -*-
import sys

rack = {"hadoop-node-31":"rack1",
                                "hadoop-node-32":"rack1",
                                "hadoop-node-33":"rack1",
                                "hadoop-node-34":"rack1",
                                "hadoop-node-49":"rack2",
                                "hadoop-node-50":"rack2",
                                "hadoop-node-51":"rack2",
                                "hadoop-node-52":"rack2",
                                "hadoop-node-53":"rack2",
                                "hadoop-node-54":"rack2",
                                "192.168.1.31":"rack1",
                                "192.168.1.32":"rack1",
                                "192.168.1.33":"rack1",
                                "192.168.1.34":"rack1",
                                "192.168.1.49":"rack2",
                                "192.168.1.50":"rack2",
                                "192.168.1.51":"rack2",
                                "192.168.1.52":"rack2",
                                "192.168.1.53":"rack2",
                                "192.168.1.54":"rack2",
                                }

if __name__=="__main__":
        print "/" + rack.get(sys.argv[1],"rack0")

    <property>
        <name>topology.script.file.name</name>
        <value>/opt/modules/hadoop/hadoop-1.0.3/bin/RackAware.py</value>
<!--机架感知脚本路径-->
    </property>
    <property>
        <name>topology.script.number.args</name>
        <value>20</value>
<!--机架服务器数量，由于我写了20个，所以这里写20-->
    </property>

2012-06-08 14:42:19,174 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* NameSystem.reGISterDatanode: node registration from 192.168.1.49:50010 storage DS-1155827498-192.168.1.49-50010-1338289368956
2012-06-08 14:42:19,204 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /rack2/192.168.1.49:50010
2012-06-08 14:42:19,205 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* NameSystem.registerDatanode: node registration from 192.168.1.53:50010 storage DS-1773813988-192.168.1.53-50010-1338289405131
2012-06-08 14:42:19,226 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /rack2/192.168.1.53:50010
2012-06-08 14:42:19,226 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* NameSystem.registerDatanode: node registration from 192.168.1.34:50010 storage DS-2024494948-127.0.0.1-50010-1338289438983
2012-06-08 14:42:19,242 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /rack1/192.168.1.34:50010
2012-06-08 14:42:19,242 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* NameSystem.registerDatanode: node registration from 192.168.1.54:50010 storage DS-767528606-192.168.1.54-50010-1338289412267

......


2012-06-08 14:42:49,492 INFO org.apache.hadoop.hdfs.StateChange: STATE* Network topology has 2 racks and 10 datanodes
2012-06-08 14:42:49,492 INFO org.apache.hadoop.hdfs.StateChange: STATE* UnderReplicatedBlocks has 0 blocks
2012-06-08 14:42:49,642 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: ReplicateQueue QueueProcessingStatistics: First cycle completed 0 blocks in 0 msec
2012-06-08 14:42:49,642 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: ReplicateQueue QueueProcessingStatistics: Queue flush completed 0 blocks in 0 msec processing time, 0 msec clock time, 1 cycles

2012-06-08 14:50:42,728 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /rack2/hadoop-node-52
2012-06-08 14:50:42,731 INFO org.apache.hadoop.mapred.JobTracker: Adding tracker tracker_hadoop-node-52:localhost.localdomain/127.0.0.1:33999 to host hadoop-node-52
2012-06-08 14:50:42,753 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /rack1/hadoop-node-34
2012-06-08 14:50:42,754 INFO org.apache.hadoop.mapred.JobTracker: Adding tracker tracker_hadoop-node-34:localhost.localdomain/127.0.0.1:37025 to host hadoop-node-34
2012-06-08 14:50:42,773 INFO org.apache.hadoop.net.NetworkTopology: Adding a new node: /rack2/hadoop-node-51