Business Continuity Manager allows you to set the starting time of backup copy to journal groups. In the above configuration, if you set the starting time of backup copy, the writes to the primary data volume up to that time will be backed up to the secondary data volume. If the above configuration is used in multiple journal volumes in multiple disk subsystems, you can set the same starting time of backup copy to all the journal groups. If you do this operation, the primary data volumes will be backed up across the multiple disk subsystems at the same time.
•URz/SIz configurations which share the URz secondary data volume and SIz
Figure 3-9 shows an example of a URz secondary data volume which is also functioning as a SIz S-VOL. This configuration allows you to use SIz to provide multiple backup copies of a single URz primary data volume.
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| URz | |
Primary data | Master journal | Secondary | |
volume | data volume | ||
volume | |||
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MCU |
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| RCU |
Restore journal volume
SIz
Figure 3-9 Shared URz secondary data volume and SIz S-VOL
Caution: If you use a URz secondary data volume as an SIz
In addition, note that if the journal volume size is small, the URz pair may be suspended by failure because of the shortage of the capacity of its journal volume.
Business Continuity Manager allows you to set the starting time of backup copy to journal groups. In the above configuration, if you set the starting time of backup copy, the writes to the primary data volume up to that time will be backed up to the secondary data volume. If the above configuration is used in multiple journal volumes in multiple storage systems, you can set the same starting time of backup copy to all the journal groups. If you do this operation, the primary data volumes will be backed up across the multiple storage systems at the same time.
•URz/SIz configuration which share the UR primary data volume and SIz S- VOL, and UR secondary data volume and SIz
Chapter 3 Preparing for Universal Replicator z/OS Operations |
