COMPUTERIZED METHODS AND SYSTEMS FOR MAINTAINING AND MODIFYING CLOUD COMPUTER SERVICES

Systems, methods, and other embodiments associated with modifying a computer-implemented service are described. In one embodiment, a method includes constructing pre-provisioned instances of a service within a first pool and constructing pre-orchestrated instances of the service within a second pool. In response to receiving a request to modify the service, a POM instance of the service is created with a modified version of executable code and assigned to a third pool. The pre-orchestrated instances within the second pool are then replaced using the POM instances from the third pool.