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The following page has been changed by izaakrubin:
http://wiki.apache.org/hadoop/Hbase/HowToMigrate
The comment on the change is:
Added more specifics about migrating from 0.1 to 0.2.
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* 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] page.
* 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. Run ''%{HBASE_HOME}/bin/hbase
migrate'' for usage. See the version-specific notes below for more specific information on
this process.
+ * From the new instance of HBase, perform the HBase migration. Run {{{{$HBASE_HOME}/bin/hbase
migrate}}} for usage. See the version-specific notes below for more specific information
on this process.
* Start the new instance of HBase.
If you would like to learn more about the HBase Migration design, see [http://wiki.apache.org/hadoop/Hbase/Migration
HBase Migration]
@@ -16, +16 @@
=== From 0.1.x to 0.2.x ===
- HBase 0.1 depends on Hadoop 0.16. HBase 0.2 depends on Hadoop 0.17 so first you will need
to upgrade your version of Hadoop as part of this migration.
+ The following are step-by-step instructions for migrating from HBase 0.1 to 0.2. This migration
requires an upgrade form Hadoop 0.16 to 0.17, although the [http://wiki.apache.org/hadoop/Hadoop%20Upgrade
Hadoop Upgrade Instructions] are slightly out-of-date (as of this writing, July 2008). As
such, the below instructions also clarify the necessary steps for upgrading Hadoop.
- After the hadoop migration is complete, the actual migration command to be executed by the
new HBase 0.2 instance is:
+ Assume Hadoop 0.16 and HBase 0.1 are already running with data you wish migrate to HBase
0.2.
+ * Stop HBase 0.1.
+ * From the [http://wiki.apache.org/hadoop/Hadoop%20Upgrade Hadoop Upgrade Instructions],
perform steps 1-4 and 9-10 (and optionally 5-8, 11-12).
+ * Run {{{{$HADOOP_HOME}/bin/start-dfs.sh -upgrade}}}
+ * Perform Hadoop upgrade steps 16-19.
+ * Download and configure HBase 0.2. Make sure ''hbase.rootdir'' is configured to be the
same as it was in HBase 0.1.
+ * Run {{{{$HBASE_HOME}/bin/hbase migrate update}}}
+ * Start HBase 0.2.
- {{{{$HBASE_HOME}/bin/hbase migrate update}}}
-
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