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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "Hbase/HowToMigrate" by stack
Date Tue, 12 Aug 2008 19:18:17 GMT
Dear Wiki user,

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The following page has been changed by stack:

The comment on the change is:
Fix suggested by Cosmin Lehene

   * Perform Hadoop upgrade steps 16-19 on your instance of Hadoop 0.17.
   * Run {{{{$HADOOP_HOME_0.17}/bin/hadoop dfsadmin -finalizeUpgrade}}}
   * Download and configure HBase 0.2.  Make sure ''hbase.rootdir'' is configured to be the
same as it was in HBase 0.1.
-  * Run {{{{$HBASE_HOME_0.2}/bin/hbase migrate update}}}
+  * Run {{{{$HBASE_HOME_0.2}/bin/hbase migrate upgrade}}}
   * Start HBase 0.2.
  As you will notice, the [http://wiki.apache.org/hadoop/Hadoop%20Upgrade Hadoop Upgrade Instructions]
(specifically steps 2-4, 16-18) ask you to generate several logs to compare and ensure that
the upgrade ran correctly.  I did notice some inconsistency in my logs between ''dfs-v-old-report-1.log''
and ''dfs-v-new-report-1.log''; specifically the ''Total effective bytes'' and ''Effective
replication multiplier'' fields did not match (in the new log, the values reported were zero
and infinity, respectively).  Additionally, ''dfs-v-new-report-1.log'' claimed that the update
was not finalized.  Running {{{{$HADOOP_HOME}/bin/hadoop dfsadmin -finalizeUpgrade}}} resolves
the second issue, finalizing the upgrade as expected.  I could not find a way to resolve the
inconsistencies with the ''Total effective bytes'' and ''Effective replication multiplier''
fields.  Nonetheless, I found no problems with the migration and the data appeared to be completely

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