Functional Overview

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# Functional Overview

The following database characteristics are defined with ADADEF:

- database name and ID

- database components (Associator, Data Storage, and Work)

  - device type

  - size

- checkpoint system file

- database default encodings

## Database Components

Each database component (Associator, Data Storage, and Work) must be formatted by the ADAFRM utility before it is defined with ADADEF. The ADADEF utility may also be used to define a new Work data set for an existing database.

Systems using the Recovery Aid feature require a recovery log (RLOG) data set, which must first be formatted with the ADAFRM utility, and then defined using the ADARAI utility.

## Checkpoint File

Adabas uses the checkpoint system file to store checkpoint data and user data provided with the Adabas CL and ET commands. It is required and must be specified using the ADADEF DEFINE (database) function.

### On this page

- Database Components
- Checkpoint File