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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hbase/HowToMigrate" by izaakrubin
Date Tue, 15 Jul 2008 00:05:12 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The following page has been changed by izaakrubin:

New page:
= How to Migrate =

== Migration in General ==

In general, performing a HBase migration will consist of the following steps:

 * Shut down the old instance of HBase.
 * If necessary, upgrade the underlying version of Hadoop to the version required by the new
instance of HBase.  Refer to the [http://wiki.apache.org/hadoop/Hadoop%20Upgrade Hadoop Upgrade]
 * Download and configure the new instance of HBase.  Make sure you configure the hbase.rootdir
of the new instance to be the same as that from the old instance.
 * From the new instance of HBase, perform the HBase migration.  See the version-specific
notes below for more specific information on this process.
 * Start the new instance of HBase.

== Version-Specific Migration Notes ==

=== From 0.1.x to 0.2.x ===

HBase 0.1 depends on Hadoop 0.16.  HBase 0.2 depends on Hadoop 0.17, and as such you will
need to upgrade your version of Hadoop as part of this migration.

The actual migration command to be executed by the new HBase 0.2 instance is:

{$HBASE_HOME}/bin/hbase migrate update

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