For synchronous high-speed backup using the Suspend/Resume function, execute the swstbackup command after the synchronous processing has started and the equivalency maintenance status has been set.
Then suspend the synchronous processing.
When history information is deleted because the number of generations has been exceeded or when the swsthistdel command is executed, the backup volume becomes the Suspend state without any history information.
If new synchronous processing starts at this time, then the suspended backup volume without history information is selected first, and differential copying starts. Only data that has been updated since the Suspend state was last set is copied, therefore the equivalency maintenance status can be reached quickly.
Note that synchronous high-speed backup using the Suspend/Resume function can also be operated from Web Console.
The flow of synchronous high-speed backup operations using the Suspend/Resume function is shown below.
Figure 4.3 Synchronous High-speed Backup Operations Using Suspend/Resume Function
