Canceling A Copy Export Operation - IBM TS7700 Series User Manual

August 15, 2017

Canceling a Copy Export Operation

There are several reasons for canceling an export operation:
• After being initiated, you may realize that the pool being processed for export was incorrect.
• Other more critical workload is required to be run on the TS7700 and the extra overhead of running the
export operation is not desired.
• A problem is encountered with the export that cannot be quickly resolved, for example there are no
physical scratch volumes available to add to the library.
• A problem is encountered with the library that requires it to be taken off-line for service.
An export operation can be canceled from a host or through the library manager console for pre 8.5.x.x
systems or on the TS7700 on systems running 8.5.x.x code and higher.
A request to cancel an export operation can be initiated from any host attached to the TS7700 subsystem
using one of the following methods:
• Host console command: LIBRARY EXPORT,XXXXXX,CANCEL - where XXXXXX is the volume
serial number of the Export List File Volume.
• Program Interface using the Library Control System (LCS) external services CBRXLCS.
For pre 8.5.x.x systems, if an export operation must be canceled and there is no host attached to the TS7700
that can issue the cancel command, you can cancel the operation through the library manager console.
Select the Cancel VTS Export/Import item from the commands pull-down and then select an active export
operation from the dialog box displayed. After confirming the selection, the library manager sends the
cancel request to the TS7700 processing the copy export operation.
Regardless of whether the cancel is originated from a host or the library manager, the TS7700 will process it
as follows:
• If processing of a physical volume has reached the point where is has been mounted to receive a
database backup, the backup will complete and the volume placed in the export-hold or eject category
before the cancel processing can be continued. Status file records are written for all logical and physical
volumes which completed export processing.
• All physical resources: drives, stacked volumes and exported stacked volumes, are made available for
normal TS7700 subsystem processing.
• A completion message is sent to all hosts attached to the TS7700 indicating that the export was canceled
via a host request. The message contains information about how much export processing completed
prior to the execution of the cancel request.
You should examine the export status file records to see what had been processed prior to the cancel
request. Any physical volumes that completed the export process should be processed as if the export
operation had completed.
© Copyright IBM Corporation, 2017 Page 52 of 117