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The following page has been changed by RaghuAngadi: http://wiki.apache.org/lucene-hadoop/Hadoop_0%2e14_Upgrade ------------------------------------------------------------------------------ == Upgrade Path == - We have tested upgrading from 0.12 to 0.14 and 0.13.1 to 0.14. However we recommend upgrading to 0.13.1 before this upgrade. Hadoop-0.13 adds an important upgrade related feature that is very useful for upgrades like the one described here. While upgrading from 0.13, if something badly goes wrong, you can always ''rollback'' to pre-upgrade state by installing 0.13 again. See [:Hadoop Upgrade: Hadoop Upgrade page] for more information. Upgrading from 0.11 and earlier version are very similar to upgrading from 0.12, but these cases are not extensively tested. + We have tested upgrading from 0.12 to 0.14 and 0.13.1 to 0.14. However we recommend upgrading to 0.13.1 before this upgrade. Hadoop-0.13 adds an important upgrade related feature that is very useful for upgrades like the one described here. While upgrading from 0.13, if something badly goes wrong, you can always ''rollback'' to pre-upgrade state by installing 0.13 again. See [:Hadoop Upgrade: Hadoop Upgrade page] for more information. Upgrading from 0.11 or earlier versions is very similar to upgrading from 0.12 and is expected to work, though not extensively tested. == Brief Upgrade Procedure ==