例

<sun-web-app> ... 
  <session-config> 
    <session-manager persistence-type="replicated"> 
      <manager-properties> 
        <property name="persistenceFrequency" value="web-method" /> 
      </manager-properties> 
      <store-properties> 
        <property name="persistenceScope" value="session" /> 
      </store-properties> 
    </session-manager> ... 
</session-config> ...