MAINTAINING VIRTUAL MACHINES FOR CLOUD-BASED OPERATORS IN A STREAMING APPLICATION IN A READY STATE

摘要

A streams manager monitors performance of a streaming application, and when the performance needs to be improved, the streams manager automatically requests virtual machines from a cloud manager. The cloud manager provisions one or more virtual machines in a cloud with the specified streams infrastructure and streams application components. The streams manager then modifies the flow graph so one or more portions of the streaming application are hosted by the virtual machines in the cloud. When performance of the streaming application indicates a virtual machine is no longer needed, the virtual machine is maintained and placed in a ready state so it can be quickly used as needed in the future without the overhead of deploying a new virtual machine.

主权项

1. An apparatus comprising:
at least one processor; a memory coupled to the at least one processor; a streaming application residing in the memory and executed by the at least one processor, the streaming application comprising a flow graph that includes a plurality of operators that process a plurality of data tuples; and a streams manager residing in the memory and executed by the at least one processor, the streams manager monitoring performance of the streaming application, and when performance of the streaming application needs to be improved, the streams manager requests a cloud manager to provision at least one virtual machine with logic to implement at least one of the plurality of operators, and when the cloud manager provisions the at least one virtual machine, the streams manager modifies the flow graph to include the at least one virtual machine in the flow graph of the streaming application, and when the streams manager determines the at least one virtual machine is no longer needed, the streams manager keeps the at least one virtual machine in a ready state until the at least one virtual machine is needed by the streams manager to be deployed to implement at least one of the plurality of operators.