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           <div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">7.5.&#160;Remote Replication Nodes</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-Management-Managing-Virtualhosts.html">Prev</a>&#160;</td><th align="center" width="60%">Chapter&#160;7.&#160;Managing Entities</th><td align="right" width="20%">&#160;<a accesskey="n" href="Java-Broker-Management-Managing-Exchanges.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes"></a>7.5.&#160;Remote Replication Nodes</h2></div></div></div><p>Used for HA only. A <a class="link" href="Java-Broker-Concepts-RemoteReplicationNodes.html" title="4.4.&#160;Remote Replication Nodes">remote replication node</a> is a representation of another virtualhost node
     in the group. Remote replication nodes are not created directly. Instead the system
     automatically creates a remote replication node for every node in the group. It serves to
     provide a view of the whole group from every node in the system.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes-Attributes"></a>7.5.1.&#160;Attributes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Name the remote replication node</em></span>. This is the name of the
             remote virtualhost node</p></li><li class="listitem"><p><span class="emphasis"><em>Role</em></span>. Indicates the role that the remote node is playing in the
             group at this moment. </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"><p><span class="emphasis"><em>MASTER</em></span> - Remote node is a master.</p></li><li class="listitem"><p><span class="emphasis"><em>REPLICA</em></span> - Remote node is a replica.</p></li><li class="listitem"><p><span class="emphasis"><em>UNREACHABLE</em></span> - Remote node unreachable from this node.
                   This remote note may be down, or an network problem may prevent it from being
                   contacted.</p></li></ul></div><p>
           </p></li><li class="listitem"><p><span class="emphasis"><em>Join time</em></span>. Time when first contact was established with this
             node.</p></li><li class="listitem"><p><span class="emphasis"><em>Last known transaction id</em></span>. Last transaction id reported
             processed by node. This is an internal transaction counter and does not relate to any
             value available to the messaging clients. This value can only be used to determine the
             node is up to date relative to others in the group.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes-Children"></a>7.5.2.&#160;Children</h3></div></div></div><p>None</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes-Lifecycle"></a>7.5.3.&#160;Lifecycle</h3></div></div></div><p>
       </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Delete</em></span>. Causes the remote node to be permanently removed from
             the group. This operation should be used when the virtualhost node cannot be deleted
             from its own Broker, for instance, if a Broker has been destroyed by machine
             failure.</p></li></ul></div><p>
     </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplication-Nodes-Operations"></a>7.5.4.&#160;Operations</h3></div></div></div><p>
       </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Transfer Master</em></span>. Initiates a process where a master is moved to
             anther node in the group. The transfer sequence is as follows. </p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p>Group waits until the proposed master is reasonable up to date.</p></li><li class="listitem"><p>Any in-flight transactions on the current master are blocked.</p></li><li class="listitem"><p>The current master awaits the proposed master to become up to date.</p></li><li class="listitem"><p>The mastership is transferred. This will automatically disconnect messaging
                   clients from the old master, and in-flight transactions are rolled back. Messaging
                   clients reconnect to the new master.</p></li><li class="listitem"><p>The old master will rejoin as a replica.</p></li></ol></div><p>
           </p></li></ul></div><p>
     </p></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-Management-Managing-Virtualhosts.html">Prev</a>&#160;</td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-Management-Managing-Entities.html">Up</a></td><td align="right" width="40%">&#160;<a accesskey="n" href="Java-Broker-Management-Managing-Exchanges.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">7.4.&#160;VirtualHosts&#160;</td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%">&#160;7.6.&#160;Exchanges</td></tr></table></div></div>

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	<div id="-middle-content">
	<div class="docbook"><div class="navheader"><table summary="Navigation header" width="100%"><tr><th align="center" colspan="3">7.5. Remote Replication Nodes</th></tr><tr><td align="left" width="20%"><a accesskey="p" href="Java-Broker-Management-Managing-Virtualhosts.html">Prev</a> </td><th align="center" width="60%">Chapter 7. Managing Entities</th><td align="right" width="20%"> <a accesskey="n" href="Java-Broker-Management-Managing-Exchanges.html">Next</a></td></tr></table><hr /></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes"></a>7.5. Remote Replication Nodes</h2></div></div></div><p>Used for HA only. A <a class="link" href="Java-Broker-Concepts-RemoteReplicationNodes.html" title="4.4. Remote Replication Nodes">remote replication node</a> is a representation of another virtualhost node
	in the group. Remote replication nodes are not created directly. Instead the system
	automatically creates a remote replication node for every node in the group. It serves to
	provide a view of the whole group from every node in the system.</p><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes-Attributes"></a>7.5.1. Attributes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Name the remote replication node</em></span>. This is the name of the
	remote virtualhost node</p></li><li class="listitem"><p><span class="emphasis"><em>Role</em></span>. Indicates the role that the remote node is playing in the
	group at this moment. </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: circle; "><li class="listitem"><p><span class="emphasis"><em>MASTER</em></span> - Remote node is a master.</p></li><li class="listitem"><p><span class="emphasis"><em>REPLICA</em></span> - Remote node is a replica.</p></li><li class="listitem"><p><span class="emphasis"><em>UNREACHABLE</em></span> - Remote node unreachable from this node.
	This remote note may be down, or an network problem may prevent it from being
	contacted.</p></li></ul></div><p>
	</p></li><li class="listitem"><p><span class="emphasis"><em>Join time</em></span>. Time when first contact was established with this
	node.</p></li><li class="listitem"><p><span class="emphasis"><em>Last known transaction id</em></span>. Last transaction id reported
	processed by node. This is an internal transaction counter and does not relate to any
	value available to the messaging clients. This value can only be used to determine the
	node is up to date relative to others in the group.</p></li></ul></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes-Children"></a>7.5.2. Children</h3></div></div></div><p>None</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplicationNodes-Lifecycle"></a>7.5.3. Lifecycle</h3></div></div></div><p>
	</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Delete</em></span>. Causes the remote node to be permanently removed from
	the group. This operation should be used when the virtualhost node cannot be deleted
	from its own Broker, for instance, if a Broker has been destroyed by machine
	failure.</p></li></ul></div><p>
	</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="Java-Broker-Management-Managing-RemoteReplication-Nodes-Operations"></a>7.5.4. Operations</h3></div></div></div><p>
	</p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><span class="emphasis"><em>Transfer Master</em></span>. Initiates a process where a master is moved to
	anther node in the group. The transfer sequence is as follows. </p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p>Group waits until the proposed master is reasonable up to date.</p></li><li class="listitem"><p>Any in-flight transactions on the current master are blocked.</p></li><li class="listitem"><p>The current master awaits the proposed master to become up to date.</p></li><li class="listitem"><p>The mastership is transferred. This will automatically disconnect messaging
	clients from the old master, and in-flight transactions are rolled back. Messaging
	clients reconnect to the new master.</p></li><li class="listitem"><p>The old master will rejoin as a replica.</p></li></ol></div><p>
	</p></li></ul></div><p>
	</p></div></div><div class="navfooter"><hr /><table summary="Navigation footer" width="100%"><tr><td align="left" width="40%"><a accesskey="p" href="Java-Broker-Management-Managing-Virtualhosts.html">Prev</a> </td><td align="center" width="20%"><a accesskey="u" href="Java-Broker-Management-Managing-Entities.html">Up</a></td><td align="right" width="40%"> <a accesskey="n" href="Java-Broker-Management-Managing-Exchanges.html">Next</a></td></tr><tr><td align="left" valign="top" width="40%">7.4. VirtualHosts </td><td align="center" width="20%"><a accesskey="h" href="Apache-Qpid-Broker-J-Book.html">Home</a></td><td align="right" valign="top" width="40%"> 7.6. Exchanges</td></tr></table></div></div>

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