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Distributed health check for global server load balancing

  • US 9,130,954 B2
  • Filed: 11/27/2002
  • Issued: 09/08/2015
  • Est. Priority Date: 09/26/2000
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • a first network device to site switch, adapted to collect health check information indicative of access conditions to components for which the first network device performs switching, wherein the collection of health check information occurs independently of a request; and

    a metric agent, at the first network device, adapted to communicate the collected health check information to a second network device to load balance, the communication occurring a plurality of times over a persistent connection between the first network device and the second network device, wherein the persistent connection comprises a single TCP connection initiated by the second network device; and

    wherein the health check information comprises information indicative of which ports of one or more host servers coupled to the first network device are up or down and the health status of applications hosted on the one or more host servers.

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