International Business Machines Corporation

Amir Perlman

James Patrick Galvin, Jr

Michael A Gilfix

Gil Perzy

Rhys D Ulerich

Ofira Tal-Aviv

Uri Segev

Galina Rubinshtein

Avshalom Houri

Gili Revel

Yakov Kupherstein

Oded Hirschfeld

Ronnie A Jones

A method for SIP presence server failover, the method including setting an expiration time of a SIP application session on a first SIP server having a first SIP presence server to match the expiration time of a SIP request that is associated with the SIP application session, setting a SIP request attribute set representing a plurality of attributes of the SIP request, replicating the SIP application session together with the attribute set to a second SIP server having a second SIP presence server, migrating the SIP application session to the second SIP server for activation thereat, detecting an event indicating that the SIP application session has been migrated, and upon detection of the event, reestablishing at the second SIP presence server the SIP request associated with the SIP application session and using the attribute set.

Sip presence server failover

Mechanisms for burst traffic smoothing for Session Initiation Protocol (SIP) processing elements are provided. A dispatch queue management engine determines whether a received packet is a TCP or UDP packet. If the packet is a TCP packet, the packet is automatically added to the dispatch queue. If the packet is a UDP packet, a value for a drop function &#x192; is generated and a random or pseudo-random number r is generated. If r has a predetermined relationship to &#x192;, then the UDP packet is added to the dispatch queue, otherwise the UDP packet is discarded. The value for &#x192; is based on the current dispatch queue load, the network quality, the retransmission rate, and the allowable drop rate. Thus, the determination as to whether to drop UDP packets or not is configurable by an administrator and also adaptable to the current network and dispatch queue conditions.

Burst traffic smoothing for SIP processing elements

A system and method for selective logging of computer activity. A method in accordance with an embodiment of the invention includes: temporarily logging program execution data to a memory buffer during execution of a program; and determining a permanent disposition of the temporarily logged data in accordance with an execution outcome of the program.

Selective logging of computer activity

Growing community of inventors

Yahud, Israel

Amir Perlman