Update Copy Workflow - HP XP7 User Manual

Related topics
"BC Z pair creation" (page

Update copy workflow

Update copy is an operation that is performed by HP XP7 to asynchronously copy new data,
differential data, on the P-VOL of a copy volume to the S-VOL.
HP XP7 goes through the following process to create an update copy:
1. HP XP7 marks I/O to the P-VOL in "DUPLEX" status as differential data and stores the location
of the data in bitmaps for transfer to the S-VOL.
2. After there are write I/O operations to a P-VOL, HP XP7 starts the update copy operation.
NOTE:
that accumulates and the elapsed time since the previous update.
The following image shows the update copy operation.
Related topics
"Splitting BC Z pairs" (page
10 Business Copy Z overview
37).
The timing of the update copy operation is based on the amount of differential data
48).