Example: Overriding default order for reload

Overview

The order in which archive media are accessed when reloading data from the archive is determined by the following:

  • Value in the Order for Reload field in the archive pool definition
  • Value in the Order for Reload field in the subpool definition

This example shows how you can change the order in which archive media are accessed when data is reloaded to the cache, index or online spool.

Subpool definitions

The archive pool has the following three subpool definitions:

Subpool

Medium

Retention period

Reload order

SUBPOOLA

Disk

90

1

SUBPOOLB

Optical Disk

9999

2

SUBPOOLC

Tape

9999

3

Default reload order

By default, the archive pool definition specifies ASIS (as is) in the Order for Reload field, which means that the entries in the Order for Reload field in the subpool definition determine the order in which subpools are accessed for reloading. In this example:

In this example, the following applies:

  1. First, Adabas Audit Data Retrieval checks whether the data can be reloaded from disk (SUBPOOLA).
  2. If this is not possible (for example, because these datasets have already expired), Adabas Audit Data Retrieval tries to reload the data from optical disk (SUBPOOLB).
  3. If this is not possible (for example, because the corresponding device is not available), Adabas Audit Data Retrieval tries to reload the data from tape (SUBPOOLC).

Changing reload order

If the optical disk device is temporarily unavailable, the reloading of all older lists from this archive pool will lead to an error and to the automatic generation of a second reload request from tape (SUBPOOLC). To prevent these errors from happening repeatedly, you can change the reload order and redirect all reload requests for this archive pool to SUBPOOLC.

To redirect all reload requests to SUBPOOLC, enter 3 in the Order for Reload field in the archive pool definition. (This modification also applies to reload request for lists that are younger than 90 days and are therefore still available on disk.)

After the optical disk device has become available again, change the value in the Order for Reload field in the archive pool definition back to ASIS to make Adabas Audit Data Retrieval use the default reload order.

Note

If you direct all reload requests of an archive pool to one archive subpool, there is no automatic generation of reload requests for other subpools if one reload request fails.