Systems and methods for load balancing via a plurality of virtual servers upon failover using metrics from a backup virtual server

A method of load balancing a virtual server using a metric from a backup virtual server, the method comprising:

• (a) identifying, by a device intermediary to a plurality of clients and a plurality of servers, that a backup virtual server is available for a virtual server executing on the device that is detected as not available;
• (b) maintaining, by the device, a status of the virtual server as available in response to identifying the backup virtual server us available;
• and
• (c) determining, by the device, a load of the virtual server using a metric of the backup virtual server.

A system of load balancing a virtual server using a metric from a backup virtual server, the system comprising:

• a device intermediary to a plurality of clients and a plurality of servers;
• a virtual server executing on the device, the virtual server managing access to the plurality of servers by the plurality of clients;
• a backup virtual server to the virtual server;
• a monitor executing on the device detecting that the virtual server is not available;
• wherein responsive to identifying that the backup virtual server is available, the device maintains a status of the virtual server as available and determines a load of the virtual server using a metric of the backup virtual server.