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Load Balancing, Session Failover, and Session IDs

Chapter 6 Session Managers 69

timeOut=1200,username=mysession,password=mypassword

• Edit the file servlets.properties in the directory server_id/config. This will

apply to the default virtual server only.

Add a line specifying a value for

servlets.sessionmgr and a line specifying

the parameters for the session manager:

servlets.sessionmgr=com.netscape.server.http.session.JdbcSessionManager

servlets.sessionmgr.initArgs=timeOut=1200,username=mysession,password=mypassword

• Edit the file contexts.properties in the directory server_id/config. This will

apply to the default virtual server only.

Add a line specifying a value for

context.context_name.sessionmgr and a

line specifying the parameters for the session manager:

context.global.sessionmgr=com.netscape.server.http.session.JdbcSessionManager

context.global.sessionmgr.initArgs=timeOut=1200,username=mysession,password=mypassword

You can change the global context or define a new context and assign specific

servlets to it. For more information, see Chapter 8, “Legacy Servlet and JSP

Configuration.”

This session manager can only store objects that implement

java.io.Serializable.

Load Balancing, Session Failover, and Session

IDs

iPlanet Web Server 6.0 supports server farm (or cluster) configurations with

off-the-shelf, session-aware front-end load balancers such as Resonate. iPlanet Web

Server 6.0 implements sticky sessions by prefixing the node_id of the server host

that generated the session to JSESSIONID, the session cookie name specified in the

Servlets 2.2 specification, as follows:

Set-Cookie: JSESSIONID=node_id-3ad%253A39c02099%253Ad19e53e2a2;

path=/app;expires=Thu, 14-Sep-2000 01:19:30 GMT

This enables the front-end load balancer to forward future requests to the same

host that generated the session.

If the session manager used by a cluster supports distributed sessions, an alternate

server can pick up a session created by a server that crashed. The

IWSSessionManager supports distributed sessions if its session-data-store

parameter has a value that defines the mode of session persistence. The

JdbcSessionManager also supports distributed sessions.

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Red Hat NETSCAPE ENTERPRISE SERVER 6.0 - NSAPI PROGRAMMER GUIDE Manuel d'utilisateur Page 69