close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": /usr/lib/python2.7/dist-packages/libsvn/_repos.so: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Changes between Version 13 and Version 14 of waue/2010/0106


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Timestamp:
Jan 7, 2010, 3:10:27 PM (16 years ago)
Author:
waue
Comment:

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  • waue/2010/0106

    v13 v14  
    4242-----------
    4343 [[Image(2010-01-06-181350_881x389_scrot.png)]]
     44
     45 * Right now,  our NameNode is in SAFE mode waiting for the DataNodes to connect.
     46
     47 * Start the rest of HDFS
     48
     49When the datanodes start, they will connect to the Name Node and an upgrade will be initiated.
     50
     51{{{
     52.... hadoop-dfs start
     53}}}
     54
     55
     56Once all the DataNodes have upgraded, you should see a message that Safe mode will be turned off automatically in X seconds.
     57
     58 * start MapReduce
     59After you have verified correct operation of HDFS, you are ready to start MapReduce.
     60
     61 * finalize the hdfs upgrade
     62
     63Now that you've confirmed your cluster is successfully running on Hadoop 0.20, you can go ahead and finalize the HDFS upgrade:
     64{{{{
     65$ sudo -u hadoop hadoop dfsadmin -finalizeUpgrade
     66}}}