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Posted to dev@tomcat.apache.org by fh...@apache.org on 2007/01/05 17:42:39 UTC
svn commit: r493078 - in /tomcat/tc6.0.x/trunk/webapps/docs:
cluster-howto.xml config/cluster-manager.xml tribes/introduction.xml
Author: fhanik
Date: Fri Jan 5 08:42:38 2007
New Revision: 493078
URL: http://svn.apache.org/viewvc?view=rev&rev=493078
Log:
Completed clustering documentation to a state more understandable.
Modified:
tomcat/tc6.0.x/trunk/webapps/docs/cluster-howto.xml
tomcat/tc6.0.x/trunk/webapps/docs/config/cluster-manager.xml
tomcat/tc6.0.x/trunk/webapps/docs/tribes/introduction.xml
Modified: tomcat/tc6.0.x/trunk/webapps/docs/cluster-howto.xml
URL: http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/cluster-howto.xml?view=diff&rev=493078&r1=493077&r2=493078
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/cluster-howto.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/cluster-howto.xml Fri Jan 5 08:42:38 2007
@@ -16,8 +16,7 @@
<section name="Important Note">
-<p><b>This document is pending an update to the latest implementation.<br/>
- You can also check the <a href="config/cluster.html">configuration reference documentation.</a></b>
+<p><b>You can also check the <a href="config/cluster.html">configuration reference documentation.</a></b>
</p>
</section>
@@ -27,12 +26,17 @@
to your <code><Engine></code> or your <code><Host></code> element to enable clustering.
</p>
<p>
- Using the above configuration will enable all to all session replication
- using the <code>DeltaManager</code> to replicate session deltas.<br/>
+ Using the above configuration will enable all-to-all session replication
+ using the <code>DeltaManager</code> to replicate session deltas. By all-to-all we mean that the session gets replicated to all the other
+ nodes in the cluster. This works great for smaller cluster but we don't recommend it for larger clusters(a lot of tomcat nodes).
+ Also when using the delta manager it will replicate to all nodes, even nodes that don't have the application deployed.<br/>
+ To get around this problem, you'll want to use the BackupManager. This manager only replicates the session data to one backup
+ node, and only to nodes that have the application deployed. Downside of the BackupManager: not quite as battle tested as the delta manager.
+ <br/>
Here are some of the important default values:<br/>
1. Multicast address is 228.0.0.4<br/>
- 2. Multicast port is 45564<br/>
- 3. The IP broadcasted is <code>java.net.InetAddress.getLocalHost().getHostAddress()</code><br/>
+ 2. Multicast port is 45564 (the port and the address together determine cluster membership.<br/>
+ 3. The IP broadcasted is <code>java.net.InetAddress.getLocalHost().getHostAddress()</code> (make sure you don't broadcast 127.0.0.1, this is a common error)<br/>
4. The TCP port listening for replication messages is the first available server socket in range <code>4000-4100</code><br/>
5. Two listeners are configured <code>ClusterSessionListener</code> and <code>JvmRouteSessionIDBinderListener</code><br/>
6. Two interceptors are configured <code>TcpFailureDetector</code> and <code>MessageDispatch15Interceptor</code><br/>
@@ -67,6 +71,7 @@
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
filter=""/>
+ <Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"
tempDir="/tmp/war-temp/"
@@ -79,6 +84,7 @@
</Cluster>
</source>
</p>
+ <p>Will cover this section in more detail later in this document.</p>
</section>
<section name="Cluster Basics">
@@ -86,23 +92,25 @@
<p>To run session replication in your Tomcat 6.0 container, the following steps
should be completed:</p>
<ul>
-<li>All your session attributes must implement <code>java.io.Serializable</code></li>
-<li>Uncomment the <code>Cluster</code> element in server.xml</li>
-<li>Uncomment the <code>Valve(ReplicationValve)</code> element in server.xml</li>
-<li>If your Tomcat instances are running on the same machine, make sure the <code>tcpListenPort</code>
- attribute is unique for each instance.</li>
-<li>Make sure your <code>web.xml</code> has the <code><distributable/></code> element
- or set at your <code><Context distributable="true" /></code></li>
-<li>If you are using mod_jk, make sure that jvmRoute attribute is set at your Engine <code><Engine name="Catalina" jvmRoute="node01" ></code>
- and that the jvmRoute attribute value matches your worker name in workers.properties</li>
-<li>Make sure that all nodes have the same time and sync with NTP service!</li>
-<li>Make sure that your loadbalancer is configured for sticky session mode.</li>
+ <li>All your session attributes must implement <code>java.io.Serializable</code></li>
+ <li>Uncomment the <code>Cluster</code> element in server.xml</li>
+ <li>If you have defined custom cluster valves, make sure you have the <code>ReplicationValve</code> defined as well under the Cluster element in server.xml</li>
+ <li>If your Tomcat instances are running on the same machine, make sure the <code>tcpListenPort</code>
+ attribute is unique for each instance, in most cases Tomcat is smart enough to resolve this on it's own by autodetecting available ports in the range 4000-4100</li>
+ <li>Make sure your <code>web.xml</code> has the <code><distributable/></code> element
+ or set at your <code><Context distributable="true" /></code></li>
+ <li>If you are using mod_jk, make sure that jvmRoute attribute is set at your Engine <code><Engine name="Catalina" jvmRoute="node01" ></code>
+ and that the jvmRoute attribute value matches your worker name in workers.properties</li>
+ <li>Make sure that all nodes have the same time and sync with NTP service!</li>
+ <li>Make sure that your loadbalancer is configured for sticky session mode.</li>
</ul>
<p>Load balancing can be achieved through many techniques, as seen in the
<a href="balancer-howto.html">Load Balancing</a> chapter.</p>
<p>Note: Remember that your session state is tracked by a cookie, so your URL must look the same from the out
side otherwise, a new session will be created.</p>
<p>Note: Clustering support currently requires the JDK version 1.5 or later.</p>
+<p>The Cluster module uses the Tomcat JULI logging framework, so you can configure logging
+ through the regular logging.properties file. To track messages, you can enable logging on the key:<code>org.apache.catalina.tribes.MESSAGES</code></p>
</section>
@@ -112,16 +120,15 @@
<ol>
<li>Using session persistence, and saving the session to a shared file system (PersistenceManager + FileStore)</li>
<li>Using session persistence, and saving the session to a shared database (PersistenceManager + JDBCStore)</li>
- <li>Using in-memory-replication, using the SimpleTcpCluster that ships with Tomcat 5 (server/lib/catalina-cluster.jar)</li>
+ <li>Using in-memory-replication, using the SimpleTcpCluster that ships with Tomcat 6 (lib/catalina-tribes.jar + lib/catalina-ha.jar)</li>
</ol>
-<p>In this release of session replication, Tomcat performs an all-to-all replication of session state.
-
- This is an algorithm that is only efficient when the clusters are small. For large clusters, the next
- release will support a primary-secondary session replication where the session will only be stored at one
- or maybe two backup servers.
+<p>In this release of session replication, Tomcat can perform an all-to-all replication of session state using the <code>DeltaManager</code> or
+ perform backup replication to only one node using the <code>BackupManager</code>.
+ The all-to-all replication is an algorithm that is only efficient when the clusters are small. For larger clusters, to use
+ a primary-secondary session replication where the session will only be stored at one backup server simply setup the BackupManager. <br/>
Currently you can use the domain worker attribute (mod_jk > 1.2.8) to build cluster partitions
- with the potential of very scaleable cluster solution.
+ with the potential of having a more scaleable cluster solution with the DeltaManager(you'll need to configure the domain interceptor for this).
In order to keep the network traffic down in an all-to-all environment, you can split your cluster
into smaller groups. This can be easily achieved by using different multicast addresses for the different groups.
A very simple setup would look like this:
@@ -165,41 +172,32 @@
sent over the wire and reinstantiated on all the other cluster nodes.
Synchronous vs asynchronous is configured using the <code>channelSendOptions</code>
flag and is an integer value. The default value for the <code>SimpleTcpCluster/DeltaManager</code> combo is
- 8, which is asynchronous. You can read more on the <a href="#pointer-to-Tribes-Channel-Javadoc-here">send flag</a>.
+ 8, which is asynchronous. You can read more on the <a href="tribes/introduction.html">send flag(overview)</a> or the
+ <a href="http://tomcat.apache.org/tomcat-6.0-doc/api/org/apache/catalina/tribes/Channel.html">send flag(javadoc)</a>.
During async replication, the request is returned before the data has been replicated. async replication yields shorter
request times, and synchronous replication guarantees the session to be replicated before the request returns.
</p>
-
+</section>
<section name="Bind session after crash to failover node">
<p>
- As you configure more then two nodes at same cluster for backup, most loadbalancer
- send don't all your requests after failover to the same node.
+ If you are using mod_jk and not using sticky sessions or for some reasons sticky session don't
+ work, or you are simply failing over, the session id will need to be modified as it previously contained
+ the worker id of the previous tomcat (as defined by jvmRoute in the Engine element).
+ To solve this, we will use the JvmRouteBinderValve.
</p>
<p>
- The JvmRouteBinderValve handle tomcat jvmRoute takeover using mod_jk module after node
- failure. After a node crashed the next request going to other cluster node. The JvmRouteBinderValve
- now detect the takeover and rewrite the jsessionid
- information to the backup cluster node. After the next response all client
- request goes direct to the backup node. The change sessionid send also to all
- other cluster nodes. Well, now the session stickyness work directly to the
- backup node, but traffic don't go back too restarted cluster nodes!<br/>
- As jsessionid was created by cookie, the change JSESSIONID cookie resend with next response.
+ The JvmRouteBinderValve rewrites the session id to ensure that the next request will remain sticky
+ (and not fall back to go to random nodes since the worker is no longer available) after a fail over.
+ The valve rewrites the JSESSIONID value in the cookie with the same name.
+ Not having this valve in place, will make it harder to ensure stickyness in case of a failure for the mod_jk module.
</p>
<p>
- You must add JvmRouteBinderValve and the corresponding cluster message listener JvmRouteSessionIDBinderListener.
- As you add the new listener you must also add the default ClusterSessionListener that receiver the normal cluster messages.
-
-<source>
-<Cluster className="org.apache.catalina.tcp.SimpleTcpCluster" >
-...
- <Valve className="org.apache.catalina.cluster.session.JvmRouteBinderValve"
- enabled="true" sessionIdAttribute="takeoverSessionid"/>
- <ClusterListener className="org.apache.catalina.cluster.session.JvmRouteSessionIDBinderListener" />
- <ClusterListener className="org.apache.catalina.cluster.session.ClusterSessionListener" />
-...
-<Cluster>
-</source>
+ By default, if no valves are configured, the JvmRouteBinderValve is added on.
+ The cluster message listener called JvmRouteSessionIDBinderListener is also defined by default and is used to actually rewrite the
+ session id on the other nodes in the cluster once a fail over has occurred.
+ Remember, if you are adding your own valves or cluster listeners in server.xml then the defaults are no longer valid,
+ make sure that you add in all the appropriate valves and listeners as defined by the default.
</p>
<p>
<b>Hint:</b><br/>
@@ -214,12 +212,12 @@
This use case means that only requested session are migrated.
</p>
-</section>
+
</section>
<section name="Configuration Example">
-<source>
+ <source>
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
channelSendOptions="6">
@@ -263,7 +261,153 @@
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
-</source>
+ </source>
+ <p>
+ Break it down!!
+ </p>
+ <source>
+ <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"
+ channelSendOptions="6">
+ </source>
+ <p>
+ The main element, inside this element all cluster details can be configured.
+ The <code>channelSendOptions</code> is the flag that is attached to each message sent by the
+ SimplTcpCluster class or any objects that are invoking the SimplTcpCluster.send method.
+ The description of the send flags is available at <a href="http://tomcat.apache.org/tomcat-6.0-doc/api/org/apache/catalina/tribes/Channel.html">
+ our javadoc site</a>
+ The <code>DeltaManager</code> sends information using the SimpleTcpCluster.send method, while the backup manager
+ sends it itself directly through the channel.
+ <br/>For more info, Please visit the <a href="config/cluster.html">reference documentation</a>
+ </p>
+ <source>
+ <Manager className="org.apache.catalina.ha.session.BackupManager"
+ expireSessionsOnShutdown="false"
+ notifyListenersOnReplication="true"
+ mapSendOptions="6"/>
+ <!--
+ <Manager className="org.apache.catalina.ha.session.DeltaManager"
+ expireSessionsOnShutdown="false"
+ notifyListenersOnReplication="true"/>
+ -->
+ </source>
+ <p>
+ This is a template for the manager configuration that will be used if no manager is defined in the <Context>
+ element. In Tomcat 5.x each webapp marked distributable had to use the same manager, this is no longer the case
+ since Tomcat 6 you can define a manager class for each webapp, so that you can mix managers in your cluster.
+ Obviously the managers on one node's application has to correspond with the same manager on the same application on the other node.
+ If no manager has been specified for the webapp, and the webapp is marked <distributable/> Tomcat will take this manager configuration
+ and create a manager instance cloning this configuration.
+ <br/>For more info, Please visit the <a href="config/cluster-manager.html">reference documentation</a>
+ </p>
+ <source>
+ <Channel className="org.apache.catalina.tribes.group.GroupChannel">
+ </source>
+ <p>
+ The channel element is <a href="tribes/introduction.html">Tribes</a>, the group communication framework
+ used inside Tomcat. This element encapsulates everything that has to do with communication and membership logic.
+ <br/>For more info, Please visit the <a href="config/cluster-channel.html">reference documentation</a>
+ </p>
+ <source>
+ <Membership className="org.apache.catalina.tribes.membership.McastService"
+ address="228.0.0.4"
+ port="45564"
+ frequency="500"
+ dropTime="3000"/>
+ </source>
+ <p>
+ Membership is done using multicasting. Please note that Tribes also supports static memberships using the
+ <code>StaticMembershipInterceptor</code> if you want to extend your membership to points beyond multicasting.
+ The address attribute is the multicast address used and the port is the multicast port. These two together
+ create the cluster separation. If you want a QA cluster and a production cluster, the easiest config is to
+ have the QA cluster be on a separate multicast address/port combination the the production cluster.<br/>
+ The membership component broadcasts TCP adress/port of itselt to the other nodes so that communication between
+ nodes can be done over TCP. Please note that the address being broadcasted is the one of the
+ <code>Receiver.address</code> attribute.
+ <br/>For more info, Please visit the <a href="config/cluster-membership.html">reference documentation</a>
+ </p>
+ <source>
+ <Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
+ address="auto"
+ port="5000"
+ selectorTimeout="100"
+ maxThreads="6"/>
+ </source>
+ <p>
+ In tribes the logic of sending and receiving data has been broken into two functional components. The Receiver, as the name suggests
+ is responsible for receiving messages. Since the Tribes stack is thread less, (a popular improvement now adopted by other frameworks as well),
+ there is a thread pool in this component that has a maxThreads and minThreads setting.<br/>
+ The address attribute is the host address that will be broadcasted by the membership component to the other nodes.
+ <br/>For more info, Please visit the <a href="config/cluster-receiver.html">reference documentation</a>
+ </p>
+ <source>
+
+ <Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
+ <Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
+ </Sender>
+ </source>
+ <p>
+ The sender component, as the name indicates is responsible for sending messages to other nodes.
+ The sender has a shell component, the <code>ReplicationTransmitter</code> but the real stuff done is done in the
+ sub component, <code>Transport</code>.
+ Tribes support having a pool of senders, so that messages can be sent in parallel and if using the NIO sender,
+ you can send messages concurrently as well.<br/>
+ Concurrently means one message to multiple senders at the same time and Parallel means multiple messages to multiple senders
+ at the same time.
+ <br/>For more info, Please visit the <a href="config/cluster-sender.html">reference documentation</a>
+ </p>
+ <source>
+ <Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
+ <Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
+ <Interceptor className="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor"/>
+ </Channel>
+ </source>
+ <p>
+ Tribes uses a stack to send messages through. Each element in the stack is called an interceptor, and works much like the valves do
+ in the Tomcat servlet container.
+ Using interceptors, logic can be broken into more managable pieces of code. The interceptors configured above are:<br/>
+ TcpFailureDetector - verifies crashed members through TCP, if multicast packets get dropped, this interceptor protects against false positives,
+ ie the node marked as crashed even though it still is alive and running.<br/>
+ MessageDispatch15Interceptor - dispatches messages to a thread (thread pool) to send message asynchrously.<br/>
+ ThroughputInterceptor - prints out simple stats on message traffic.<br/>
+ Please note that the order of interceptors is important. the way they are defined in server.xml is the way they are represented in the
+ channel stack. Think of it as a linked list, with the head being the first most interceptor and the tail the last.
+ <br/>For more info, Please visit the <a href="config/cluster-interceptor.html">reference documentation</a>
+ </p>
+ <source>
+ <Valve className="org.apache.catalina.ha.tcp.ReplicationValve"
+ filter=".*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt;"/>
+ </source>
+ <p>
+ The cluster uses valves to track requests to web applications, we've mentioned the ReplicationValve and the JvmRouteBinderValve above.
+ The <Cluster> element itself is not part of the pipeline in Tomcat, instead the cluster adds the valve to its parent container.
+ If the <Cluster> elements is configured in the <Engine> element, the valves get added to the engine and so on.
+ <br/>For more info, Please visit the <a href="config/cluster-valve.html">reference documentation</a>
+ </p>
+ <source>
+ <Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer"
+ tempDir="/tmp/war-temp/"
+ deployDir="/tmp/war-deploy/"
+ watchDir="/tmp/war-listen/"
+ watchEnabled="false"/>
+ </source>
+ <p>
+ The default tomcat cluster supports farmed deployment, ie, the cluster can deploy and undeploy applications on the other nodes.
+ The state of this component is currently in flux but will be addressed soon. There was a change in the deployment algorithm
+ between Tomcat 5.0 and 5.5 and at that point, the logic of this component changed to where the deploy dir has to match the
+ webapps directory.
+ <br/>For more info, Please visit the <a href="config/cluster-deployer.html">reference documentation</a>
+ </p>
+ <source>
+ <ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
+ </Cluster>
+ </source>
+ <p>
+ Since the SimpleTcpCluster itself is a sender and receiver of the Channel object, components can register themselves as listeners to
+ the SimpleTcpCluster. The listener above <code>ClusterSessionListener</code> listens for DeltaManager replication messages
+ and applies the deltas to the manager that in turn applies it to the session.
+ <br/>For more info, Please visit the <a href="config/cluster-listener.html">reference documentation</a>
+ </p>
+
</section>
<section name="Cluster Architecture">
@@ -287,28 +431,34 @@
| -- Manager
| \
| -- DeltaManager
+ | -- BackupManager
|
---------------------------
| \
Channel \
----------------------------- \
- | | | \
- Receiver Sender Membership \
- -- Valve
- | \
- | -- ReplicationValve
- | -- JvmRouteBinderValve
- |
- -- LifecycleListener
- |
- -- ClusterListener
- | \
- | -- ClusterSessionListener
- | -- JvmRouteSessionIDBinderListener
- |
- -- Deployer
- \
- -- FarmWarDeployer
+ | \
+ Interceptor_1 .. \
+ | \
+ Interceptor_N \
+ ----------------------------- \
+ | | | \
+ Receiver Sender Membership \
+ -- Valve
+ | \
+ | -- ReplicationValve
+ | -- JvmRouteBinderValve
+ |
+ -- LifecycleListener
+ |
+ -- ClusterListener
+ | \
+ | -- ClusterSessionListener
+ | -- JvmRouteSessionIDBinderListener
+ |
+ -- Deployer
+ \
+ -- FarmWarDeployer
</source>
@@ -497,39 +647,6 @@
<td>The complete cluster element</td>
<td><code>type=Cluster</code></td>
<td><code>type=Cluster,host=${HOST}</code></td>
- </tr>
-
- <tr>
- <td>ClusterSender</td>
- <td>Configuration and stats of the sender infrastructure</td>
- <td><code>type=ClusterSender</code></td>
- <td><code>type=ClusterSender,host=${HOST}</code></td>
- </tr>
-
- <tr>
- <td>ClusterReceiver</td>
- <td>Configuration and stats of the recevier infrastructure</td>
- <td><code>type=ClusterReceiver</code></td>
- <td><code>type=ClusterReceiver,host=${HOST}</code></td>
- </tr>
-
- <tr>
- <td>ClusterMembership</td>
- <td>Configuration and stats of the membership infrastructure</td>
- <td><code>type=ClusterMembership</code></td>
- <td><code>type=ClusterMembership,host=${HOST}</code></td>
- </tr>
-
- <tr>
- <td>IDataSender</td>
- <td>For every cluster member it exist a sender mbeans.
- It exists speziall MBeans to all replication modes</td>
- <td><code>type=IDataSender,
- senderAddress=${MEMBER.SENDER.IP},
- senderPort=${MEMBER.SENDER.PORT}</code></td>
- <td><code>type=IDataSender,host=${HOST},
- senderAddress=${MEMBER.SENDER.IP},
- senderPort=${MEMBER.SENDER.PORT}</code></td>
</tr>
<tr>
Modified: tomcat/tc6.0.x/trunk/webapps/docs/config/cluster-manager.xml
URL: http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/config/cluster-manager.xml?view=diff&rev=493078&r1=493077&r2=493078
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/config/cluster-manager.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/config/cluster-manager.xml Fri Jan 5 08:42:38 2007
@@ -43,17 +43,10 @@
</section>
<section name="Attributes">
-
<subsection name="Common Attributes">
<attributes>
<attribute name="className" required="true">
</attribute>
- <attribute name="domainReplication" required="false">
- Set to true if you wish sessions to be replicated only to members that have the same logical
- domain set. If set to false, session replication will ignore the domain setting the
- <code><a href="cluster-membership.html"><Membership></a></code>
- element.
- </attribute>
<attribute name="name" required="false">
<b>The name of this cluster manager, the name is used to identify a session manager on a node.
The name might get modified by the <code>Cluster</code> element to make it unique in the container.</b>
@@ -65,26 +58,39 @@
Set to <code>true</code> if you wish to have session listeners notified when
session attributes are being replicated or removed across Tomcat nodes in the cluster.
</attribute>
+ <attribute name="expireSessionsOnShutdown" required="false">
+ When a webapplication is being shutdown, Tomcat issues an expire call to each session to
+ notify all the listeners. If you wish for all sessions to expire on all nodes when
+ a shutdown occurs on one node, set this value to <code>true</code>.
+ Default value is <code>false</code>.
+ </attribute>
+
</attributes>
</subsection>
<subsection name="org.apache.catalina.ha.session.DeltaManager Attributes">
<attributes>
+ <attribute name="domainReplication" required="false">
+ Set to true if you wish sessions to be replicated only to members that have the same logical
+ domain set. If set to false, session replication will ignore the domain setting the
+ <code><a href="cluster-membership.html"><Membership></a></code>
+ element.
+ </attribute>
<attribute name="expireSessionsOnShutdown" required="false">
When a webapplication is being shutdown, Tomcat issues an expire call to each session to
notify all the listeners. If you wish for all sessions to expire on all nodes when
a shutdown occurs on one node, set this value to <code>true</code>.
Default value is <code>false</code>.
</attribute>
-
- </attributes>
-
-
+ </attributes>
+ </subsection>
+ <subsection name="org.apache.catalina.ha.session.BackupManager Attributes">
+ <attributes>
+ <attribute name="mapSendOptions" required="false">
+ The backup manager uses a replicated map, this map is sending and receiving messages.
+ You can setup the flag for how this map is sending messages, the default value is <code>8</code>(asynchronous).
+ </attribute>
+ </attributes>
</subsection>
-
-
</section>
-
-
</body>
-
</document>
Modified: tomcat/tc6.0.x/trunk/webapps/docs/tribes/introduction.xml
URL: http://svn.apache.org/viewvc/tomcat/tc6.0.x/trunk/webapps/docs/tribes/introduction.xml?view=diff&rev=493078&r1=493077&r2=493078
==============================================================================
--- tomcat/tc6.0.x/trunk/webapps/docs/tribes/introduction.xml (original)
+++ tomcat/tc6.0.x/trunk/webapps/docs/tribes/introduction.xml Fri Jan 5 08:42:38 2007
@@ -2,7 +2,7 @@
<!DOCTYPE document [
<!ENTITY project SYSTEM "project.xml">
]>
-<document url="introduction.html">
+<document url="tribes.html">
&project;
@@ -244,87 +244,12 @@
<section name="Where can I get Tribes">
<p>
- I hope you have enjoyed this short introduction to Tribes. You can download <a href="../apache-tribes.jar">Tribes here</a>
- or you can download Tribes <a href="../tribes-all.zip">including javadoc and this doc</a>
+
</p>
</section>
-<!--
-<section name="Cluster Configuration for ReplicationTransmitter">
-<p>
-List of Attributes<br/>
-<table border="1" cellpadding="5">
-
- <tr>
- <th align="center" bgcolor="aqua">Attribute</th>
- <th align="center" bgcolor="aqua">Description</th>
- <th align="center" bgcolor="aqua">Default value</th>
- </tr>
-
- <tr>
- <td>replicationMode</td>
- <td>replication mode (<em>synchronous</em>, <em>pooled</em>, <em>asynchronous</em> or <em>fastasyncqueue</em>)
- </td>
- <td><code>pooled</code></td>
- </tr>
-
- <tr>
- <td>processSenderFrequency</td>
- <td>Control the sender keepalive status and drop sender socket connection after timeout is reached.
- Check every processSenderFrequency value engine background ticks.
- </td>
- <td><code>2</code></td>
- </tr>
-
- <tr>
- <td>compress</td>
- <td>compress bytes before sending (consume memory, but reduce network traffic - GZIP)</td>
- <td><code>false</code></td>
- </tr>
-
- <tr>
- <td>ackTimeout</td>
- <td>acknowledge timeout and only usefull it waitForAck is true</td>
- <td><code>15000</code></td>
- </tr>
-
- <tr>
- <td>waitForAck</td>
- <td>Wait for ack after data send</td>
- <td><code>false</code></td>
- </tr>
-
- <tr>
- <td>autoConnect</td>
- <td>is sender disabled, fork a new socket</td>
- <td><code>false</code></td>
- </tr>
-
- <tr>
- <td>doTransmitterProcessingStats</td>
- <td>create processing time stats</td>
- <td><code>false</code></td>
- </tr>
-</table>
-</p>
-<p>
-Example to get statistic information, wait for ack at every message send and transfer at compressed mode<br/>
-<source>
- <Sender
- className="org.apache.catalina.cluster.tcp.ReplicationTransmitter"
- replicationMode="fastasyncqueue"
- compress="true"
- doTransmitterProcessingStats="true"
- ackTimeout="15000"
- waitForAck="true"
- autoConnect="false"/>
-</source>
-</p>
-</section>
-
--->
</body>
</document>
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