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Lazar Borissov

Volker Driesen

Thomas Brodkorb

Anton Georgiev

Ivan Mihalev

Dencho Mitev

Stefan Stoychev

In a distributed computer system with cluster architecture, a number of service requests are redirected from a first instance of the cluster to a second instance of the cluster for execution. A software patch is applied to one or more software components running on an application server node of the first instance of the cluster. A number of service requests are redirected from the second instance of the cluster to the first instance of the cluster for execution. The software patch is applied on the one or more software components running on an application server node of the second instance of the cluster. A number of new service requests are directed to the upgraded second instance of the cluster for processing.

Zero downtime mechanism for software upgrade of a distributed computer system

A method and a system are described that involve obtaining information about a plurality of inbox objects, wherein each inbox object is linked to another inbox object via a set of operations, each operation having a priority. The set of operations are executed on a subset of the plurality of inbox objects to generate a modified subset of the plurality of inbox objects. The modified subset is scanned to extract a list of files. The extracted files are used by a maintenance procedure to replace files in a system with older information and thus to update the system.

Method and system for obtaining files from a set of sources

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Sofia, Bulgaria

Lazar Borissov