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Showing posts with label Application Services. Show all posts
Showing posts with label Application Services. Show all posts

Tuesday 17 June 2008

Informatica PowerCenter 8x Key Concepts – 1


We shall look at the fundamental components of the Informatica PowerCenter 8.x Suite, the key components are
1. PowerCenter Domain
2. PowerCenter Repository
3. Administration Console
4. PowerCenter Client
5. Repository Service
6. Integration Service
PowerCenter Domain
A domain is the primary unit for management and administration of services in PowerCenter. Node, Service Manager and Application Services are components of a domain.
Node
Node is the logical representation of a machine in a domain. The machine in which the PowerCenter is installed acts as a Domain and also as a primary node. We can add other machines as nodes in the domain and configure the nodes to run application services such as the Integration Service or Repository Service. All service requests from other nodes in the domain go through the primary node also called as ‘master gateway’.
The Service Manager
The Service Manager runs on each node within a domain and is responsible for starting and running the application services. The Service Manager performs the following functions,
  • Alerts. Provides notifications of events like shutdowns, restart
  • Authentication. Authenticates user requests from the Administration Console, PowerCenter Client, Metadata Manager, and Data Analyzer
  • Domain configuration. Manages configuration details of the domain like machine name, port
  • Node configuration. Manages configuration details of a node metadata like machine name, port
  • Licensing. When an application service connects to the domain for the first time the licensing registration is performed and for subsequent connections the licensing information is verified
  • Logging. Manages the event logs from each service, the messages could be ‘Fatal’, ‘Error’, ‘Warning’, ‘Info’
  • User management. Manages users, groups, roles, and privileges
Application services
The services that essentially perform data movement, connect to different data sources and manage data are called Application services, they are namely Repository Service, Integration Service, Web Services Hub, SAPBW Service, Reporting Service and Metadata Manager Service. The application services run on each node based on the way we configure the node and the application service
Domain Configuration
Some of the configurations for a domain involves assigning host name, port numbers to the nodes, setting up Resilience Timeout values, providing connection information of metadata Database, SMTP details etc. All the Configuration information for a domain is stored in a set of relational database tables within the repository. Some of the global properties that are applicable for Application Services like ‘Maximum Restart Attempts’, ‘Dispatch Mode’ as ‘Round Robin’/’Metric Based’/’Adaptive’ etc are configured under Domain Configuration