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<title>Cluster Membership Monitor</title>
<h1>Cluster Membership Monitor</h1>

The Cluster Membership Monitor (CMM) maintains a consistent cluster
membership roster.  Through these
    <a href="sc/cmp">cluster membership protocols</a>,
database corruption and subsequent transmission of corrupted or
inconsistent data to clients is avoided.  When nodes join or leave the
cluster (thus changing the membership) CMM coordinates global reconfiguration
of various system services, for example, of the
    <a href="sc/dlm">DLM</a>
and 
    <a href="sc/cvm">CVM</a>. <p>
