Systems and methods for providing dynamic connection spillover among virtual servers

摘要

A method for an appliance to switch handling of transport layer connection requests from a first virtual server of the appliance managing a first plurality of services to a second virtual server of the appliance managing a second plurality of services upon exceeding, by the first virtual server, a maximum connection threshold determined dynamically from a status of the first plurality of services The appliance establishes a predetermined threshold identifying a maximum active transport layer connection capacity for the first virtual server that comprising a sum of a predetermined connection capacity for each of the plurality of services. The appliance determines via monitoring that the status of a service of the plurality of services indicates the service is not available and adjusts the predetermined threshold to comprise the sum of the predetermined connection capacity for each of the plurality of services having a status of available.

主权项

1. A method for redirecting transport layer connection requests responsive to an adjusted threshold of a number of clients, the method comprising:
(a) identifying, by a device intermediary to a plurality of clients and a plurality of services executing on one or more servers, a subset of the plurality of services that are identified as available; (b) identifying, by the device, for each service of the subset of the plurality of services, a number of clients the service is configured to handle; (c) establishing, by the device, a threshold for a first virtual server that directs connection requests from the plurality of clients to the plurality of services, the threshold comprising a sum of the identified number of clients each service of the subset of the plurality of services is configured to handle; (d) monitoring, by the device, a status of each of the subset of the plurality of services, the status of at least one of the subset of the plurality of services is identified as unavailable; (e) adjusting, by the device responsive to monitoring, the sum of the threshold to exclude for those services of the plurality of services that are currently identified as unavailable the number of clients those services are configured to handle; (f) determining, by the device, a number of clients of the first virtual server exceeds the adjusted threshold; and (g) establishing, by the device in response to the determination, a second virtual server for directing transport layer connection requests from the plurality of clients to a second plurality of services.