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Load balancing web service by rejecting connections

專利號
US11159406B2
公開日期
2021-10-26
申請人
Facebook, Inc.(US CA Menlo Park)
發(fā)明人
Robert M. English; Jeffrey Rothschild
IPC分類
H04L12/26; G06F9/50; H04L12/911
技術(shù)領(lǐng)域
server,balancer,queue,130a,tcp,requests,rejection,load,in,request
地域: CA CA Menlo Park

摘要

A load balancer allocates requests to a pool of web servers configured to have low queue capacities. If the queue capacity of a web server is reached, the web server responds to an additional request with a rejection notification to the load balancer, which enables the load balancer to quickly send the rejected request to another web server. Each web server self-monitors its rejection rate. If the rejection rate exceeds a threshold, the number of processes concurrently running on the web server is increased. If the rejection rate falls below a threshold, the number of processes concurrently running on the web server is decreased.

說明書

Referring back to FIG. 1, the computing environment 100 also includes a server pool 139. The server pool 139 is a collection of at least two servers 130A-D but could comprise any number of servers greater than two. The server pool 139 may be dedicated to one load balancer 120, or may be shared between multiple load balancers 120. As described above with reference to FIG. 4, the servers 130A-D of the server pool 139 receive TCP requests routed to them from clients 110 through the load balancer 120. If a server 103A is at capacity, the server 103A responds to a subsequent TCP request by sending a rejection notification 404 back to the load balancer 120 that sent the TCP request. Thus, the systems and methods of some embodiments described herein enable TCP requests from multiple load balancers 120 to be distributed among a shared server pool 139 in a method that reduces or optimizes response time without any of the multiple load balancers 120 having to maintain information regarding the workload of the servers among the server pool 139.

權(quán)利要求

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