Web Services Security Guides › CA SiteMinder WSS Upgrade Guide › Planning Migration and Upgrades › Upgrade Paths

Upgrade Paths

An upgrade consists of deploying 12.51 components to an existing CA SiteMinder® environment. Upgrading to 12.51 can be accomplished in two ways:

• Completing a migration.
• Configuring a parallel 12.51 environment next to an existing environment. Both environments use one or more key stores to maintain single sign–on.

Migration

A migration is the process of upgrading individual CA SOA Security Manager components until your environment is operating at CA SiteMinder WSS 12.51. Upgrading individual components consists of one or more steps during which you:

• Take a component offline.
• Upgrade the component.
• Bring the component online.

You upgrade individual components over an extended period to maintain system availability. A key to maintaining system availability is the order in which you upgrade components. During a migration, specific components that have been upgraded can continue to communicate with prior versions. This type of communication is known as mixed-mode support.

The following illustrates the concept of a migration:

Parallel Upgrade

A parallel upgrade is the process of configuring a CA SiteMinder WSS 12.51 environment beside an existing r12.1 SP3 environment. Configuring a parallel upgrade consists of multiple steps during which you:

• Leave the existing environment unchanged
• Configure a 12.51 environment
• Use a common key store or multiple key stores to enable single sign–on between both environments

The following illustrates the concept of a parallel upgrade.