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The following page has been changed by stack: http://wiki.apache.org/hadoop/Hbase/HowToMigrate The comment on the change is: Minor change; point at the doc on API differences ------------------------------------------------------------------------------ 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 intact. + The API in 0.2 is not backward-compatible with hbase 0.1 versions. See [http://wiki.apache.org/hadoop/Hbase/Plan-0.2/APIChanges API Changes] for discussion of the main differences. + == Other Migration-Related Concerns == === Redo Logs ===
