Connection cache for highly available TCP systems with fail...

Details Connection cache for highly available TCP systems with fail... Connection cache for highly available TCP systems with fail...

2005-08-23

2005-08-23

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S006130, C714S006130, C714S043000, C714S056000, C709S203000, C709S209000

Reexamination Certificate

active

06934875

ABSTRACT:
The present invention provides a method, system and apparatus by which TCP connections may be failed-over from one system to another within a highly available network service, and appear transparent to the remote client. The connection state and ownership information of a system is broadcast within the network, so that if a first system crashes while running an application, a predetermined take-over policy causes a peer system to assume connection without loss of data such that a permanent connection has been established from the client's point of view. After the failed system has been restored to a normal state, new connections are established by the first system. A connection cache device stores connection information for use during the failover.

REFERENCES:
patent: 5812751 (1998-09-01), Ekrot et al.
patent: 6185695 (2001-02-01), Murphy et al.
patent: 6246666 (2001-06-01), Purcell et al.
patent: 6539494 (2003-03-01), Abramson et al.
patent: 6601101 (2003-07-01), Lee et al.
patent: 2003/0014480 (2003-01-01), Pullara et al.
BROADCAST Entry, Computer Desktop Encyclopedia, copyright 1981-2004.
MULTICAST Entry, Computer Desktop Encyclopedia, copyright 1981-2004.
UNICAST Entry, Computer Desktop Encyclopedia, copyright 1981-2004.

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