Topology selection summary

 

	Security	Performance	Throughput	Maintain- ability	Availability	Session
Single machine	Little isolation between components	Competition for machine resources	Limited to machine resources	Ease of installation and maintenance	Machine is single point of failure
Remote Web server	Allows for firewall/DMZ	- Separation of loads - Performance usually better than local	Independent tuning	- Independent configuration and component replacement - More administrative overhead - Need copy of plug-in config.xml file	Introduces single point of failure
Separate database server	Firewall can provide isolation	Separation of loads	- Independent tuning - Must consider network bottleneck	- Use already established DBA procedures - Independent configuration - More administrative overhead	- Introduces single point of failure - Use already established HA servers
Separate Web/EJB container	More options for firewalls	Typically slower than single JVM	Clustering can improve throughput	More administrative overhead	Introduces single point of failure
Vertical scaling		Improved throughput on large SMP servers	Limited to resources on a single machine	Easiest to maintain	- Process isolation - Process redundancy	- May use session affinity - Memory-to- memory session replication or persistent session database for session failover
Horizontal scaling		Distribution of load	Distribution of connections	More to install / maintain	Process and hardware redundancy	- May use session affinity - Memory-to- memory session replication or persistent session database required for session failover
Add Web server		Distribution of load	Distribution of connections	- More to install / maintain - Need replication of configs / pages	Best in general	Use load balancer SSL session id affinity when using SSL
One cell				Ease of maintenance
Multiple cells		Less lookups and interprocess communication		Harder to maintain than single cell	Process, hardware and software redundancy

Topology selection considerations

  Prev | Home | Next

 

WebSphere is a trademark of the IBM Corporation in the United States, other countries, or both.

 

IBM is a trademark of the IBM Corporation in the United States, other countries, or both.