Sync two cluster

[Hamado Dene]

hi Hbase community, In our production environment we have a main cluster and 
one used as a replica in a second datacenter.  We have found that the disk 
space used on the primary is much greater than on the replica.  So we think the 
replica is far behind the primary.  Is there a way to synchronize the two 
clusters without impacting the primary cluster too much?  Still keeping 
replication on?
Hbase version: 2.2.Hadoop version: 2.8.5
Thanks
Hamado Dene