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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Trivial Update of "Hbase/HowToMigrate" by stack
Date Tue, 21 Jul 2009 22:29:58 GMT
Dear Wiki user,

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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.
  

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