Lucent Technologies Inc.

At+t Corp.

Ronnie Elbert Dean

John H Pokropinski

Ralph Wadlinger

Norbert Engel

Reginald L Allen

Keith W Johnson

Eunan Muldoon

Patrick W McFarland

Gail E Tate

Guatam Patwari

Arthur H Brown

Platform and/or application software on all online, machine/servers in a cluster is updated without manually taking each machine/server offline. Initially, platform and/or application software for updating is stored in respective directories in an APPLY phase. Next, the new platform and/or application software is activated with or without a trial/test phase in an ACTIVATE phase. Where the new platform and/or application software is activated with a trial/test phase, a ROLLBACK phase is either automatically or manually invoked by the application in the event of a failure of the new software for backing out the new platform and/or application software and reactivating the previous platform and/or application software. An OFFICLAL phase then transitions the new platform and/or application software to the official state followed by a REACTIVATE phase for reactivating the backup copy of the previous/old platform and/or application software after the new software has been made official.

Method for providing scaleable restart and backout of software upgrades for clustered computing

A system for effecting recovery of a network involving a plurality of computing apparatuses with each respective computing apparatus hosting at least one respective service, includes: (a) at least one control unit substantially embodied in hardware and coupled with each computing apparatus; and (b) at least one control program substantially embodied in software and distributed among at least one of the computing apparatuses. The system responds to a computing apparatus becoming inoperative by effecting a recovery operation. The recovery operation includes distributing the services hosted by the inoperative computing apparatus as distributed services among operating computing apparatuses and returning the distributed services to the inoperative computing apparatus after the inoperative computing apparatus becomes operative. The at least one control unit and the at least one control program cooperate to effect the recovery operation.

System and method for effecting recovery of a network

A hierarchal organization of registers containing error indicators is utilized to determine which of a plurality of error recovery modules is to be executed. A redundancy mask and a priority mask stored in a data table associated with each register are sequentially applied to each register in order to eliminate redundant error indicators resulting from a common fault and to set the order of execution of error recovery modules. Thus, the redundancy and priorities associated with detected errors can be controlled substantially independent of the actual error recovery actions to be taken.

Table driven fault recovery system with redundancy and priority handling

Growing community of inventors

Aurora, IL, United States of America

Ronnie Elbert Dean