PREVENTING UNNECESSARY REGISTRATION OF VIRTUAL MACHINES

Systems and methods are provided for efficiently registering cloned VMs while preventing unnecessary subsequent registrations. Two independent threads can execute on a cloned VM and control different variables indicating whether registration is needed or has already been performed. A first thread can set a first variable based on an internal identifier of the cloned VM relative to the parent VM. It can also check a second variable, set by a second thread, based on an external identifier of the cloned VM not being updated at a backend cloud service. It can then set a third variable indicating whether registration has been triggered or not, based on the other variables. To avoid duplication, the second thread sets the second variable based on both the external identifier as well as a status of the first variable. The variables can be atomic variables to avoid multi-thread interference and undesirable thread locks.