Business application tiers

Business application tiers are groups of similar business application elements. They are used to create functional groups to integrate TADDM with other products and to ensure compatibility with business applications that were created in TADDM 7.2.2.

Functional groups that are created from tiers have the same names as the tier names. Tiers are created based on the business traits of business application elements. For example, one tier can contain all computer systems. Another tier can contain all application servers. And the third tier can contain all Java Platform, Enterprise Edition applications. Assigning CIs to particular tiers is based on rules that are defined by users in configuration files.

TADDM 7.3.0
Special tiers
There are two kinds of tiers, regular and special. Special tiers are designed exclusively for the following kinds of business applications:
  • The ones which were migrated from TADDM 7.2.2.
  • The ones which were created from application descriptors and which have functional group names set.
Tiers are used to create functional groups with the same names as tier names only if all of the following conditions are met:
  • The com.ibm.cdb.serviceinfrastructure.compatAPI.preserveFunctionalGroups property is set to true in the collation.properties file.
  • The migrated grouping pattern has the useMigratedTierNames attribute set to true.
  • The selector has the tierName attribute set.
If the preceding conditions are not met, tier names and, as a result, functional group names are set by using the grouping pattern configuration. For more information, see Tiers configuration.
Special tiers have the following characteristics:
  • Special tiers have precedence over regular tiers. If a special tier exists, the regular tier name is ignored.
  • Special tiers apply only to the core CI (migrated business applications by default contain only core CI, they have no Dependency Traversal Templates).
  • Special tiers can be turned off globally by setting the com.ibm.cdb.serviceinfrastructure.compatAPI.preserveFunctionalGroups parameter to false in the collation.properties file.
  • Special tiers can be turned off per single grouping pattern in Data Management Portal.
Fix Pack 1 TADDM 7.3.0.1
There are two kinds of tiers, regular and manual.
Regular tiers
Regular tier names are calculated by using the grouping pattern configuration. For more information, see Tiers configuration.
Manual tiers
You can set manual tiers for selectors manually in Data Management Portal, in Grouping Patterns pane. However, manual tiers are set automatically for the following kinds of grouping patterns:
  • The ones, which were migrated from TADDM 7.2.2.
  • The ones, which were created from application descriptors and have functional group names set.
Manual tiers have precedence over regular tiers. If a manual tier exists, the regular tier name is ignored.