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| <h1><span class="caps">JMX</span></h1> |
| |
| <p>Apache Hedwig has extensive support for <span class="caps">JMX, </span>which allows viewing and managing a hedwig cluster.</p> |
| |
| <p>This document assumes that you have basic knowledge of <span class="caps">JMX.</span> See <a href="http://java.sun.com/javase/technologies/core/mntr-mgmt/javamanagement/">Sun <span class="caps">JMX</span> Technology</a> page to get started with <span class="caps">JMX.</span></p> |
| |
| <p>See the <a href="http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html"><span class="caps">JMX</span> Management Guide</a> for details on setting up local and remote management of VM instances. By default the included <i>hedwig</i> script supports only local management - review the linked document to enable support for remote management (beyond the scope of this document).</p> |
| |
| <p><i>Hub Server</i> is a <span class="caps">JMX </span>manageable server, which registers the proper MBeans during initialization to support <span class="caps">JMX </span>monitoring and management of the instance.</p> |
| |
| <h1>Hub Server MBean Reference</h1> |
| |
| <p>This table details <span class="caps">JMX </span>for a hub server.</p> |
| |
| <table><tr><td>_.MBean</td><td>_.MBean Object Name</td><td>_.Description</td></tr><tr><td>PubSubServer</td><td>PubSubServer</td><td>Represents a hub server. It is the root MBean for hub server, which includes statistics for a hub server. E.g. number packets sent/received/redirected, and statistics for pub/sub/unsub/consume operations.</td></tr><tr><td>NettyHandlers</td><td>NettyHandler</td><td>Provide statistics for netty handlers. Currently it just returns number of subscription channels established to a hub server.</td></tr><tr><td>ReadAheadCache</td><td>ReadAheadCache</td><td>Provide read ahead cache statistics.</td></tr></table> |
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