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From st...@apache.org
Subject hbase git commit: Add note to upgrade section on DLR
Date Mon, 01 Dec 2014 23:37:09 GMT
Repository: hbase
Updated Branches:
  refs/heads/master b8fcf0ff2 -> 703848cee


Add note to upgrade section on DLR


Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/703848ce
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/703848ce
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/703848ce

Branch: refs/heads/master
Commit: 703848ceea988795f21dadce86a86de9ecae7eaf
Parents: b8fcf0f
Author: stack <stack@apache.org>
Authored: Mon Dec 1 15:36:43 2014 -0800
Committer: stack <stack@apache.org>
Committed: Mon Dec 1 15:36:56 2014 -0800

----------------------------------------------------------------------
 src/main/docbkx/upgrading.xml | 10 ++++++++++
 1 file changed, 10 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hbase/blob/703848ce/src/main/docbkx/upgrading.xml
----------------------------------------------------------------------
diff --git a/src/main/docbkx/upgrading.xml b/src/main/docbkx/upgrading.xml
index 86b5585..546be22 100644
--- a/src/main/docbkx/upgrading.xml
+++ b/src/main/docbkx/upgrading.xml
@@ -158,6 +158,16 @@
               be sure to follow the recommendations therein.
             </para>
           </section>
+          <section xml:id="dlr"><title>Distributed Log Replay</title>
+            <para>
+              <xref linkend="distributed.log.replay" /> is off by default in hbase-1.0.
+                Enabling it can make a big difference improving HBase MTTR. Enable this
+                feature if you are doing a clean stop/start when you are upgrading.
+                You cannot rolling upgrade on to this feature (caveat if you are running
+                on a version of hbase in excess of hbase-0.98.4 -- see
+                <link xlink:href="https://issues.apache.org/jira/browse/HBASE-12577">HBASE-12577
Disable distributed log replay by default</link> for more).
+            </para>
+          </section>
         </section>
         <section xml:id="upgrade1.0.rolling.upgrade">
           <title>Rolling upgrade from 0.98.x to HBase 1.0.0</title>


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