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From dm...@apache.org
Subject svn commit: r1178572 - /hbase/trunk/src/docbkx/ops_mgt.xml
Date Mon, 03 Oct 2011 20:53:22 GMT
Author: dmeil
Date: Mon Oct  3 20:53:21 2011
New Revision: 1178572

URL: http://svn.apache.org/viewvc?rev=1178572&view=rev
HBASE-4533 tweaks to backup section


Modified: hbase/trunk/src/docbkx/ops_mgt.xml
URL: http://svn.apache.org/viewvc/hbase/trunk/src/docbkx/ops_mgt.xml?rev=1178572&r1=1178571&r2=1178572&view=diff
--- hbase/trunk/src/docbkx/ops_mgt.xml (original)
+++ hbase/trunk/src/docbkx/ops_mgt.xml Mon Oct  3 20:53:21 2011
@@ -267,15 +267,18 @@ false
-      <section xml:id="ops.backup.fullshutdown.nn"><title>Backup NameNode</title>
-        <para>
-        </para>
-      </section>
       <section xml:id="ops.backup.fullshutdown.distcp"><title>Distcp</title>
-        <para>Distcp could be used to either copy the contents of the hbase directory
in HDFS to either the same cluster, or do a different cluster.
+        <para>Distcp could be used to either copy the contents of the HBase directory
in HDFS to either the same cluster in another directory, or 
+        to a different cluster.
         <para>Note:  Distcp works in this situation because the cluster is down and
there are no in-flight edits to files.  
-        This is not recommended on a live cluster.
+        Distcp-ing of files in the HBase directory is not generally recommended on a live
+        </para>
+      </section>
+      <section xml:id="ops.backup.fullshutdown.distcp"><title>Restore (if needed)</title>
+        <para>The backup of the hbase directory from HDFS is copied onto the 'real'
hbase directory via distcp.  The act of copying these files 
+        creates new HDFS metadata, which is why a restore of the NameNode edits from the
time of the HBase backup isn't required for this kind of
+        restore, because it's a restore (via distcp) of a specific HDFS directory (i.e.,
the HBase part) not the entire HDFS file-system.

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