The patent's assignee is
News editors obtained the following quote from the background information supplied by the inventors: "The present invention relates generally to continuous availability between sites at unlimited distances, and specifically to variable configurations for continuous availability of workloads in a multi-site environment.
"Existing continuous availability and disaster recovery solutions are limited by a number of factors. Application availability protects against data loss, but is limited to a maximum amount of distance between sites. Existing solutions support a maximum distance that is considered too limited for many customer environments.
"Disaster recovery solutions provide unlimited distance between sites with minimal data loss, but require starting systems, applications, and their supporting infrastructure on the backup site, which may take several hours.
"Both disaster recovery and continuous availability systems additionally require modifications to software applications, such as database servers, and hardware, such as routers and switches, in order to implement the various disaster recovery and continuous availability functions, and therefore require additional cost and reconfiguration in order to implement. Existing disaster recovery and continuous availability solutions operate at a site or system level, not at a workload level. In addition, existing disaster recovery and continuous availability systems provide only a limited set of configurations for site to site availability and recovery, none of which apply to the workload."
As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Embodiments include a method, system, and computer program product for maintaining continuous availability. An embodiment of the present invention includes receiving a unit of work data. The unit of work data is distributed among the plurality of workloads using either an active/standby configuration, an active/query configuration, an active/partitioned configuration, or an active/active configuration. A primary workload is selected from a plurality of workloads to process the unit of work data based on a workload distribution rule. It is determined if the primary workload is capable of processing the unit of work data based on one or more user configurable settings. If the primary site is capable of processing the unit of work data then the unit of work data is transmitted to the primary workload. Otherwise the unit of work data is transmitted to a secondary workload. The unit of work data is replicated between the primary workload and the secondary workload.
"Additional features and advantages are realized through the techniques of the present embodiment. Other embodiments and aspects are described herein and are considered a part of the claimed invention. For a better understanding of the invention with the advantages and features, refer to the description and to the drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
"The subject matter that is regarded as the invention is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
"FIG. 1 illustrates a block diagram of a system for continuous availability across multiple sites at unlimited distances in an embodiment;
"FIG. 2 illustrates a block diagram of the various components in a system for continuous availability across multiple sites at unlimited distances in accordance with an embodiment;
"FIG. 3 is a block diagram that illustrates a simplified multi-site, multi-workload configuration in an unlimited distance continuous availability system in an embodiment;
"FIG. 4 illustrates a block diagram of an individual site implementation of the long distance continuous availability system in an embodiment;
"FIG. 5 illustrates a process flow of a continuous availability system in an embodiment;
"FIG. 6 illustrates a process flow of an active/standby configuration in an embodiment;
"FIG. 7 illustrates a process flow for processing query workload transactions in an active/query configuration in an embodiment;
"FIG. 8 illustrates a process flow for processing a workflow using an active/partitioned configuration in an embodiment; and
"FIG. 9 illustrates a process flow of workload distribution in an active/active configuration in an embodiment."
For additional information on this patent application, see: Anaya, Jaime F.; Cadarette, Paul M.; Fitzgerald, Michael G.;
Keywords for this news article include: Information Technology, Information and Data Loss and Recovery,
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