Defining Map Groups and Map Group Chunking Criteria

This section discusses how to:

Define map groups.
Define chunking criteria.

You can configure the data transformation process to run on maps as a group. A map group may contain map groups within the main map group, as well as one or more individual maps. Map groups are submitted as a job unit and can run either in serial or parallel mode. To optimize performance by processing data more efficiently, you can define chunking criteria on the Map Group Filter page.

Pages Used to Define Map Groups and Chunking Criteria

Page Name	Definition Name	Navigation	Usage
Map Groups	EOEW_GRP_DFN	select Enterprise Components, then select Data Transformation, then select Define Map Groups, then select Map Groups	Create map groups.
Map Group Filter	EOEW_GRP_FLTR	Click the Chunking link on the Map Groups page.	Define chunking criteria for maps.

Map Groups Page

Use the Map Groups page (EOEW_GRP_DFN) to create map groups.

Navigation

select Enterprise Components, then select Data Transformation, then select Define Map Groups, then select Map Groups

Image: Map Groups page

This example illustrates the fields and controls on the Map Groups page. You can find definitions for the fields and controls later on this page.

Subject Area

Select a subject area.

For new maps groups, the subject area will be set to the default as defined on the Subject Area page.

Parallel Processing For Group

Select to run the process in parallel mode, which runs the processes simultaneously. Clear to run it in serial mode, which runs each process in the map group sequentially.

Group Type and Map Object

Select the maps and/or map groups that you want in the order in which you want them to run.

Note: Map object prompts are restricted by subject area. Only objects that are in the map group's current subject area and those in the default subject area appear.

(Optional) Chunking

Click to access the Map Group Filter page to define chunking criteria for the associated map.

See Map Group Filter Page.

Note: The Chunking link is only available for Group Types of Map. If you want to chunk a group, you need to go to that group's definition to define the criteria.

Map Group Filter Page

Use the Map Group Filter page (EOEW_GRP_FLTR) to define chunking criteria for maps.

Navigation

Click the Chunking link on the Map Groups page.

Image: Map Group Filter page

This example illustrates the fields and controls on the Map Group Filter page. You can find definitions for the fields and controls later on this page.

Chunking is a mechanism that makes large amounts of processing easier through the use of multiple small parallel processes. By enabling chunking, multiple jobs are spawned from one job stream. These jobs run in parallel or serial to process data efficiently. It is an optional mechanism to help with performance. The user is responsible to define chunks that include all of the source data without duplicating any rows. The system will not verify this. The map group is still the unit of work. The group job is not complete until all of the chunks are also complete.

Parallel Processing

Select to run the process in parallel mode, which runs the processes simultaneously. Clear to run it in serial mode, which runs each process in the chunk sequentially.

Column Alias

Select a column alias. Available values are derived from the source data object for the map you are currently chunking.

Operator

Select an operator to define the chunking condition.

Field Value

Enter the field value that completes criteria for the chunk number.

And/Or Switch

Select And or Or to compound multiple sets of criteria.

Note: The chunks you define must be configured to capture all of the source data without duplicating rows.