Tivoli Header

Administrator's Reference

DEFINE LOGCOPY (Define a Volume Copy of a Recovery Log Volume)

Use this command to create a copy (mirrored volume) of a recovery log volume. Mirroring the recovery log increases the recovery log availability and provides a safeguard against media failure. You can have as many as two copies of a recovery log volume. After each recovery log volume copy is defined, the server attempts to synchronize the volume copy with the recovery log.

All recovery log volumes reside on a random access volume. Volume copies must have at least the same capacity as the original volume and should be defined on separate physical devices. Any additional space on the volume copy is not used.

This command generates a background process that you can cancel with the CANCEL PROCESS command. If a DEFINE LOGCOPY process is canceled, the volume copy is created. However, synchronization processing is canceled leaving the volume in a stale state. To display information on background processes, use the QUERY PROCESS command.

Privilege Class

To issue this command, you must have system privilege or unrestricted storage privilege.

Syntax

>>-DEFine LOGCopy--volume_name--copy_volume_name---------------><
 
 

Parameters

volume_name (Required)
Specifies the name of the recovery log to be mirrored.

copy_volume_name (Required)
Specifies the file name of the volume you want to assign as a recovery log volume copy. The name cannot contain any embedded blanks or equal signs. For VSAM linear data sets, specify a standard VSAM cluster name. A VSAM cluster name consists of one or more qualifiers, which are delimited by periods. The length of each qualifier is from 1 to 8 alphanumeric characters. The maximum length of the cluster name is 42 characters. An example is ADSM.BFS.SPOOL2.VOLA.
Note:
The server does not support VSAM Extended Format Linear Datasets. The server supports VSAM Linear Datasets that have been defined at 4GB or less.

Examples

Task

Create a recovery log volume copy named GLEDDIE.TIVSM.PINV for the recovery log volume named HARVEY.TIVSM.PINV.

Command:
define logcopy harvey.tivsm.pinv gleddie.tivsm.pinv

Related Commands

Table 49. Commands Related to DEFINE LOGCOPY

Command Description
CANCEL PROCESS Cancels a background server process.
DEFINE LOGVOLUME Defines a disk volume to the recovery log.
DELETE LOGVOLUME Deletes a volume from the recovery log.
QUERY LOGVOLUME Displays information about log volumes.
QUERY PROCESS Displays information about background processes.


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