Andrew J Champagne

US Patent:

20130304892, Nov 14, 2013

Filed:

Jul 15, 2013

Appl. No.:

13/941859

Inventors:

Andrew F. Champagne - Springfield MA, US
Gregory Fletcher - Boston MA, US
Daniel Stodolsky - Somerville MA, US

International Classification:

H04L 12/24

US Classification:

709223

Abstract:

Applications that run on an overlay network-based managed service achieve high performance gains using a set of TCP optimizations. In a first optimization, a typical single TCP connection between a client and an origin server is broken into preferably three (3) separate TCP connections. These connections are: an edge-to-client connection, an edge-to-edge connection, and edge-to-origin connection. A second optimization replicates TCP state along the connection to increase fault tolerance. In this approach, preferably a given TCP connection is maintained on two servers. When a packet is received by one server, called the primary, its state is updated and then passed to a second server, called the backup. Only when the backup sends an acknowledgement back to the primary can it then send a TCP acknowledgement back to the host that originally sent the packet. Another optimization reduces connection establishment latency.