Dispatchers and Services
You can have more than one dispatcher in your IBM Cognos environment. In such distributed installations one dispatcher is configured for every instance of the Content Manager or Application Tier Components that are installed and configured in your environment.
After you install and configure IBM Cognos software, one dispatcher is available on each computer by default. Each dispatcher has a set of associated services, listed in the following table.
IBM Cognos services
After you install and configure IBM Cognos Analytics, one dispatcher is available on each computer by default. Each dispatcher has a set of associated services, listed in the following table.
Service |
Purpose |
---|---|
Agent service |
Runs agents. If the conditions for an agent are met when the agent runs, the agent service asks the monitor service to run the tasks. |
Annotation service |
Enables the addition of commentary to reports via the IBM Cognos Workspace. These comments persist across versions of the report. |
Batch report service |
Manages background requests to run reports and provides output on behalf of the monitor service. |
Content Manager cache service |
Enhances the overall system performance and Content Manager scalability by caching frequent query results in each dispatcher. |
Content Manager service |
|
Delivery service |
Sends emails to an external SMTP server on behalf of other services, such as the report service, job service, or agent service |
Event management service |
Creates, schedules, and manages event objects that represent reports, jobs, agents, content store maintenance, and deployment imports and exports. |
Graphics service |
Produces graphics on behalf of the Report service. Graphics can be generated in 4 different formats: Raster, Vector, Microsoft Excel XML or PDF. |
Human task service |
Enables the creation and management of human tasks. A human task such as report approval can be assigned to individuals or groups on an ad hoc basis or by any of the other services. |
Job service |
Runs jobs by signaling the monitor service to run job steps in the background. Steps include reports, other jobs, import, exports, and so on. |
Log service |
Records log messages generated by the dispatcher and other services. The log service can be configured to record log information in a file, a database, a remote log server, Windows Event Viewer, or a UNIX system log. The log information can then be analyzed by customers or by Cognos Software Services, including:
|
Metadata service |
Provides support for data lineage information displayed in Cognos Viewer, Reporting, Query Studio, and Analysis Studio. Lineage information includes information such as data source and calculation expressions. |
Migration service |
Manages the migration from IBM Cognos Series 7 to IBM Cognos Analytics. |
Mobile service |
Manages activities related to IBM Cognos Mobile client:
|
Monitor service |
|
Planning administration console service |
Manages communication with the Contributor Administration Console. |
Planning data service |
Manages communications for real-time reporting from Contributor plan data. |
Planning job service |
Manages communications with the Planning Job Server subsystem. |
Planning web service |
Manages communications with Contributor Web and Contributor Add-in for Excel users. |
PowerPlay® service |
Manages requests to run PowerPlay reports. |
Presentation service |
|
Query service |
Manages Dynamic Query requests and returns the result to the requesting batch or report service. |
Relational metadata service |
Used by Framework Manager and CubeDesigner to import metadata from relational databases. It may also be used by Dynamic Query Analyzer at runtime. |
Report data service |
Manages the transfer of report data between IBM Cognos Analytics and applications that consume the data, such as IBM Cognos for Microsoft Office and IBM Cognos Mobile. |
Report service |
Manages interactive requests to run reports and provides output for a user. |
Repository service |
Manages requests to retrieve archived report output from an archive repository or object store. |
System service |
Defines the Bus API-compliant service used to obtain application-wide configuration parameters. It also provides methods that normalize and validate locale strings and map locale strings to locales supported by your application. |
Visualization Gallery service |
Used to load and retrieve RAVE1 visualizations into the Visualization Gallery in Reporting. It is required by the Report Service. |