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From st...@apache.org
Subject git commit: HBASE-4456 [doc] Add a section about RS failover (Misty Stanley-Jones)
Date Thu, 29 May 2014 06:10:31 GMT
Repository: hbase
Updated Branches:
  refs/heads/master 9fc9c0f21 -> 2db8aafe7


HBASE-4456 [doc] Add a section about RS failover (Misty Stanley-Jones)


Project: http://git-wip-us.apache.org/repos/asf/hbase/repo
Commit: http://git-wip-us.apache.org/repos/asf/hbase/commit/2db8aafe
Tree: http://git-wip-us.apache.org/repos/asf/hbase/tree/2db8aafe
Diff: http://git-wip-us.apache.org/repos/asf/hbase/diff/2db8aafe

Branch: refs/heads/master
Commit: 2db8aafe7df26c61791ce05de5bde1090b8f955d
Parents: 9fc9c0f
Author: Michael Stack <stack@duboce.net>
Authored: Wed May 28 23:10:21 2014 -0700
Committer: Michael Stack <stack@duboce.net>
Committed: Wed May 28 23:10:21 2014 -0700

----------------------------------------------------------------------
 src/main/docbkx/book.xml | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hbase/blob/2db8aafe/src/main/docbkx/book.xml
----------------------------------------------------------------------
diff --git a/src/main/docbkx/book.xml b/src/main/docbkx/book.xml
index 53340ca..014a0db 100644
--- a/src/main/docbkx/book.xml
+++ b/src/main/docbkx/book.xml
@@ -2193,19 +2193,31 @@ rs.close();
           </para>
         </section>
 
-        <section xml:id="regions.arch.assignment.failover">
+        <section
+          xml:id="regions.arch.assignment.failover">
           <title>Failover</title>
-          <para>When a RegionServer fails (short version):
-            <orderedlist>
-              <listitem><para>The regions immediately become unavailable because
the RegionServer is down.</para>
+          <para>When a RegionServer fails: <orderedlist>
+              <listitem>
+                <para>The regions immediately become unavailable because the RegionServer
is
+                  down.</para>
+              </listitem>
+              <listitem>
+                <para>The Master will detect that the RegionServer has failed.</para>
               </listitem>
-              <listitem><para>The Master will detect that the RegionServer has
failed.</para>
+              <listitem>
+                <para>The region assignments will be considered invalid and will be
re-assigned just
+                  like the startup sequence.</para>
               </listitem>
-              <listitem><para>The region assignments will be considered invalid
and will be re-assigned just
-                like the startup sequence.</para>
+              <listitem>
+                <para>In-flight queries are re-tried, and not lost.</para>
+              </listitem>
+              <listitem>
+                <para>Operations are switched to a new RegionServer within the following
amount of
+                  time:</para>
+                <programlisting>ZooKeeper session timeout + split time + assignment/replay
time</programlisting>
               </listitem>
             </orderedlist>
-           </para>
+          </para>
         </section>
 
         <section xml:id="regions.arch.balancer">


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