StorageTek 6 manual Set Tchniqe Procedure, JCL Requirements, Shadow, Both, Standby, Slsprint

Set

The journals contain a record of all transactions that update the control data set. There are two journals per host. It is recommended that they are placed on separate HDAs from the primary control data set DASD volume.

SHADOW

specifies that there is to be two distinct copies of the control data set (primary and secondary) for recovery purposes. It is recommended that these data sets reside on separate HDAs and separate strings. A journal is not recorded.

BOTH

specifies that two distinct copies of the control data set (primary and secondary) and journals are specified for recovery purposes. Default is BOTH.

STANDBY

specifies that primary, secondary, and standby control data sets are to be recorded for recovery purposes. No journals are recorded during HSC operation.

ALL

specifies that all control data sets (primary, secondary, and standby) and journals are to be kept and available for recovery purposes.

SET TCHNIQE PROCEDURE

Use the following procedure to invoke the TCHNIQE utility and to set the appropriate recovery technique value:

1.ALLOCATE, based on existing CDS definitions, any new CDS copies that will be needed for the subsequent SET recovery technique.

2.Stop the HSCs on all hosts configured to use the CDS you are intending to update with SET recovery technique.

3.Run the BACKup utility.

4.Run the RESTore utility to restore all CDS copies required to support the current recovery technique. If the recovery technique update in the following step requires new CDS copies, then include them in this restore.

5.Run the SET utility with the appropriate recovery technique value. It is important to note that the SET utility for this recovery technique update must include /FILE statements for all CDS copies defined in either the old or the new recovery technique.

6.Run the BACKup utility again. This backup provides you with the ability to restore the updated CDS.

JCL Requirements

The following definitions apply to the JCL for SET utilities:

SLSPRINT

output messages from the utility program.

316VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601