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The following page has been changed by stack: http://wiki.apache.org/hadoop/Hbase/HowToMigrate ------------------------------------------------------------------------------ Migration does not work for transactional hbase installs or for indexed hbase installs. Talk to us if you need this. - This migration rewrites all data. It will take a while. TODO: MR version and single-threaded version. How-to. + This migration rewrites all data. It will take a while. It will disable compression setting all column families to no compression. Enable manually post-compression (Rare should be person who has compression enabled -- talk to us if this is a problem). ==== Preparing for Migration ==== - You must do a few things first before you can begin migration. + You must do a few things first before you can begin migration of either hadoop or hbase. ===== Can you back up your data? ===== Migration has been tested but if you have sufficient space in hdfs to make a copy of your hbase rootdir, do so. Just in case. Use hdfs distcp. @@ -86, +86 @@ {{{./bin/hbase org.apache.hadoop.hbase.regionserver.HRegion}}} ==== Migrating ==== + + Migrate hadoop. Refer to the [http://wiki.apache.org/hadoop/Hadoop%20Upgrade Hadoop Upgrade] page. + + Migrate HBase. + + ==== Post-Migration ==== Make sure you replace all under {{{$HBASE_HOME/conf}}} with files from the new release. For example, be sure to replace your old hbase-default.xml with the version from the new hbase release.
