Please use this identifier to cite or link to this item: http://theses.ncl.ac.uk/jspui/handle/10443/2630
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBrook, Matthew Jess-
dc.date.accessioned2015-04-28T13:30:06Z-
dc.date.available2015-04-28T13:30:06Z-
dc.date.issued2014-
dc.identifier.urihttp://hdl.handle.net/10443/2630-
dc.descriptionPhD Thesisen_US
dc.description.abstractDistributed applications often make use of replicated state to afford a greater level of availability and throughput. This is achieved by allowing individual processes to progress without requiring prior synchronisation. This approach, termed optimistic replication, results in divergent replicas that must be reconciled to achieve an overall consistent state. Concurrent operations to shared objects in the replicas result in conflicting updates that require reconciliatory action to rectify. This typically takes the form of compensatory execution or simply undoing and rolling back client state. When considering user interaction with the application, there exists relationships and intent in the ordering and execution of these operations. The enactment of reconciliation that determines one action as conflicted may have far reaching implications with regards to the user’s original intent. In such scenarios, the compensatory action applied to a conflict may require previous operations to also be undone or compensated such that the user’s intent is maintained. Therefore, an ability to manage the contention to the shared data across the distributed application to pre-emptively lower conflicts resulting from these infringements is desirable. The aim is to not hinder throughput, achieved from the weaker consistency model known as eventual consistency. In this thesis, a model is presented for a contention management framework that schedules access using the expected execution inherent in the application domain to best inform the contention manager. A backoff scheme is employed to create an access schedule, preserving user intent for applications that require this high level of maintenance for user actions. By using such an approach, this results in a performance improvement seen in the reduction of the overall number of conflicts, while also improving overall system throughput. This thesis describes how the contention management scheme operates and, through experimentation, the performance benefits received.en_US
dc.language.isoenen_US
dc.publisherNewcastle Universityen_US
dc.titleDynamic contention management for distributed applicationsen_US
dc.typeThesisen_US
Appears in Collections:School of Computing Science

Files in This Item:
File Description SizeFormat 
Brook. M. 14.pdfThesis1.1 MBAdobe PDFView/Open
dspacelicence.pdfLicence43.82 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.