SWITCH STREAM command

Summary

Privileges

System manager

Function

You can switch streams-parallel, ring, concatenated, GDG-to the next member at any time.

Syntax

SWITCH STREAM streamname [ RESET ]

Where: streamname specifies CCAJRNL, CCAJLOG, CHKPOINT, or CHKPNTS. The command is valid for only these streams.

Usage notes

If you specify:

• Journal stream CCAJRNL or CCAJLOG, the currently active data set is closed and the next data set defined to the stream is opened.

• Checkpoint stream CHKPOINT or CHKPNTS, the currently active data set in the stream is closed after the next record is written to the data set.

If a SWITCH STREAM CCAJRNL command is issued during CHECKPOINT EXTENDED QUIESCE command processing, the journal will be switched, a new checkpoint issued, and the duration extended quiesce time-out set in CPQZSECS will be reset to its maximum, original value-disregarding the already elapsed time.

Valid only for a CCAJLOG stream specified as a Parallel GDG.

RESET	This optional parameter will cause any disabled parallel GDG members to be reopened during the switch.