From CauchoWiki

The <persistent-store> configures persistent storage for distributed objects like sessions. The session-config must have a <use-persistent-store/> to use the store.

tag	description	default
type	file, jdbc, or cluster	required
init|persistent-store specific configuration

Contents 1 type="file" 2 type="jdbc" 3 type="cluster" 4 Example

[edit] type="file"

The file store is suitable only for single-server configurations which want to persist the session start over server restarts. It is useful for development servers, letting you keep sessions across web-app restarts.

tag	description	default
path	the path to the persistence directory	required

[edit] type="jdbc"

The jdbc store uses a database server to persist the sessions. Requires Resin Professional.

tag	description	default
data-source	a configured <database>	required

[edit] type="cluster"

Uses TCP connections to replicate sessions across the cluster. Requires Resin Professional. In 3.0.20 and later, the sessions are backed up onto two servers, meaning any two servers can go down without loss of session information.

tag	description	default
path	a directory where the sessions will be stored	required
triplicate	stores sessions on two backup servers	true (3.0.20 and later)

[edit] Example

<resin xmlns="http://caucho.com/ns/resin">

<server>
  <cluster>
    <srun server-id="a" port="6810"/>
    <srun server-id="b" port="6811"/>
    <srun server-id="c" port="6812"/>
  </cluster>

  <persistent-store type="cluster">
    <init path="file:/tmp/caucho/qa/session"
           triplicate="true"/>
  </persistent-store>

  <web-app-default>
    <session-config use-persistent-store="true"/>
  </web-app-default>

  <host id=>
    <web-app id='/'>
    </web-app>
  </host>
</server>
</resin>