Vmax's precopy copy split explains

There is actually no split in the Vmax storage (VNX), and Vmax's split is actually the copy completion meaning (copied), with the following two commands as an example:

1) symeclone-g DG Precopy

2) symeclone-g DG Activate

The first command actually creates a relationship between P and S-precopy, a full clone (Vmax P-s is the overall copy,vnx is an increment), such as the host hangs a volume, the whole clone this volume.

A second command is called copy.

For example, the execution time of the first command is 10:00am, the second command execution time is 15:00pm,10:00 first overall preclone, if there is no data change between the 15:00,copy amount is 0, if the change 1g,15:00 copy 1g.

That is: Precopy is the full clone,copy is incremental clone, which is the feature of Vmax.

Vmax's precopy copy split explains