How to minimize SavVol usage on a destination file system when setting up IP replication
It is not apparent that different ways of setting up IP replication lead to different SavVol usage behavior.
If a user first create the source and destination file system, then sets up replication, the SavVol size on destination side will expand to reflect the size of source file system.
This may cause many problems because the user may not realize due to the SavVol size on destination side, file system expansion later on replicated file systems may fail, or they cannot create new file systems replications due to no more free space on the destination.
Moreover, the only way to shrink the destination SavVol is to destroy the replication and delete the destination file system and associated SavVol.
Therefore, the best way to create/recreate an IP replication is using the -pool option in CLI or to use Web GUI to create the replication without choosing a destination file system.
Reference: Knowledgebase article emc214527