Safeguarded Copy session properties
Use the View/Modify Properties notebook to view or modify properties for IBM® DS8000® Safeguarded Copy sessions.
The properties are displayed on different tabs in the notebook. Use the Session Options tab to set properties that apply to the entire session. Use the Backup Options options tab to set properties that apply to the backup. Use the H1-R1 Options tab to set properties that apply to the recovery relationship.
- Session Options
- Enter the properties for the session.
- Description
- Type the description for this session.
- System or sysplex
- Select the z/OS system or sysplex that you want to associate with the session. When this option is set, the Backup command is submitted through the z/OS connection to that system or sysplex to provide performance improvements during the backup process. To enable this feature, volumes in the session must be attached to the system or sysplex and IOS APAR OA59561 must be applied.
- Backup Options
- Enter the properties for the Safeguarded backups.
- Expire Backup on Auto Roll
- When this option is set, the session automatically expires a backup when the session determines
that one or more of the volumes has auto rolled the backup. Set the Expire Backup on Auto
Roll option to free up additional space whenever one or more volumes do not have enough
backup capacity to form new backups. This feature can help avoid out-of-space conditions. However,
when a backup is automatically expired, it is no longer available for recovery across any of the
volumes that contained that backup. By default, this option is NOT selected, so you must select it
to enable this feature. When this option is not set, the backup is not automatically expired so that
if one or more volumes did not auto roll the backup, those volumes can still be recovered to that
backup. To allow recovery to those volumes, you must remove any volumes indicating that they auto
rolled that backup, from the session. See Recovering volumes to backups marked as not recoverable due to volume auto roll for more information.
Search on the topic "Recovering volumes to backups marked as not recoverable
due to volume auto roll" in the Troubleshooting section of the Copy Services Manager online help documentation at https://www.ibm.com/support/knowledgecenter/SSESK4 for more
information.Note: If you select the Expire Backup on Auto Roll option, but the backup is in a recovery relationship, and the hardware rolls a volume off, Copy Services Manager does not expire it.
For more explanation about expired backups and auto roll, see Safeguarded Copy.
- Allow Backups to be Manually Expired
- When this option is set, backups can be expired manually through the Expire Backup, Terminate, or Remove Copy Set command. When this option is not set, backups will be expired only by the server as specified by the retention period policy. Manual expires will not be allowed and if a command is issued that will cause a backup to be expired, it will fail.
- Minimum Timeframe per backup
- This option defines the minimum time in minutes that the session will allow the backup command to be issued. The options are designed to ensure that the backup command cannot be issued at a rate that would cause older backups to automatically roll off because of space conditions when the preferred duration of the backups is no longer met.
- Retention Period Since Last Recoverable Backup
- This option defines the customers preferred duration for the backups on the session based on the
last recoverable backup that was taken. This option helps you define how long backups should be
retained to meet service level agreements. The backup capacity for all volumes in the session and
the schedule of the backups should be set to values that support the retention period.Important: The retention period is based on the second-to-last recoverable backup. The retention design always keeps at least two recoverable backups. The hardware does not allow recovery of the last recoverable backup. Copy Services Manager allows you to recover the last recoverable backup, but automatically takes a new backup so that the recover can complete. Because a new backup takes up additional backup capacity, the design ensures that there is always one backup available for recovery that does not use more backup capacity. If additional backup capacity is used, it might cause older backups to automatically expire on the hardware due to a lack of space.Important: The retention period is based on the second-to-last recoverable backup. The retention design always keeps at least two recoverable backups. The hardware might not support recovery of the last recoverable backup. If the hardware does not support it, Copy Services Manager allows you to recover the last recoverable backup, but automatically takes a new backup so that the recover can complete. Because a new backup takes up additional backup capacity, the design ensures that there is always one backup available for recovery that does not use more backup capacity. If additional backup capacity is used, it might cause older backups to automatically expire on the hardware due to a lack of space. However, if the hardware supports it, the last backup can be recovered without the need for an additional backup.
- Minimum Number of Backups To Always Retain
- This option defines the customers preferred number of backups to always retain. This option indicates that a backup should not be expired even if it is older than the time specified for the Retention Period option, if the deletion of that backup would cause the total number of backups to fall below this number. This option applies only to deletions due to the specified Retention Period time and does not apply to the Expire Backup command.
- H1-R1 Options
- Enter the properties for the role pair.
- No Copy
- This option defines if the recovery relationship will be established with background copy. If No Copy is selected, then a background copy is not automatically started when the relationship is established. To start the background copy for a no copy relationship issue the Initiate Background Copy command. If No Copy is not selected, then a full background copy of the data will occur when the relationship is established. If the recovery volume is a space efficient volume, the background copy might lead to fully provisioning the volume.
- Persistent
- Select this option to keep the recovery relationship established on the hardware after all tracks are copied to the target volume. If you do not select this option, the recovery replication relationship is removed from the hardware after the target volume contains a complete image of the recovered backup.