Patent ID: 8521691

Claim:
A computer-implemented method for transition from a preexisting replication service, for execution by at least a processor, the method comprising: configuring a new replication service to provide replication from a production volume at a production site to a replication volume at a replication site, wherein the new replication service includes a production site splitter and a production site replication appliance at the production site and a replication site replication appliance at the replication site and wherein the production site replication appliance is configured to track commands received at the production site splitter in a production site delta marking stream stored in a production site journal and the replication site replication appliance is configured to track commands received at the replication site in a replication site delta marking stream stored in a replication site journal; disabling the preexisting replication service; and enabling the new replication service to provide transition from the preexisting replication service to the new replication service.