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Dynamically Allocating and Freeing Datastores

Dynamically Allocating and Freeing Datastores

DATASTOR command

You can allocate and free datastores dynamically during a reporter session by using the DATASTOR command. Changes that you make with this command are effective for the current reporter session only.

The syntax for maintaining the active datastore list is: DATASTOR USE EDS(dsname)

or

DATASTOR DROP

USE

Makes the specified datastore available to the reporter. Any datastore previously allocated becomes unavailable.

This command automatically verifies that the newly allocated file is a valid EDS. An EDS is valid only if it meets all of the following criteria:

It is a VSAM KSDS. It has an LRECL less than 32K. Its key length is 32

DROP

Makes the datastore unavailable to the reporter.

Each time a DATASTOR command is processed, the INQUIRE SUMMARY display is automatically invoked, providing statistics on the EDS that is currently active. See Displaying EDS Status for more information on the INQUIRE command.

While the reporter is acquiring data from the EDS, the following display (Figure 25) appears approximately every 30 seconds. You can stop this display at any time by pressing the Attention key.

FIGURE 25. Command Execution Delay Display

******************************************************************************* **

  • *

    +------------------------------------------------------------------------+

*

  • *

    | DISPLAY RALL COMBINE

|

*

  • *

    +------------------------------------------------------------------------+

*

  • *

    The delay in satisfying the current request is due to the amount of data

    • *

      retrieval necessary to process it or possible system contention/delays

*

* * * * *

* * * * *

Elapsed time of request

= 00:31 (MM:SS)

Number of records processed = 200

* * * * *

*******************************************************************************

Reporting in a Multiple Datastore Environment

101

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