An application system comprising an application server configured to run
first version software for an application and second version software for
the application. The application system further comprises a staging
database server configured to initially interface with the second version
software to populate a staging database system with second data for the
application generated by the second version software. The application
system further comprises a production database server configured to
initially interface with the first version software to populate a
production database system with first data for the application generated
by the first version software, synchronize the first data with the second
data to replicate the second data to the production database system,
cease interfacing with the first version software and begin to interface
with the second version software to populate the production database
system with the second data generated by the second version software.