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Trading consistency for availability for an increased dependability

Name: Trading consistency for availability for an increased dependability
Brand: VDM Verlag
SKU: 9783639340877
Price: 253.29 RON
Availability: InStock

Autor: Klaus Fuchshofer

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Editura: VDM Verlag

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253.29 lei

A requirement to distributed systems is their dependability. Applications expect high availability A...

Informații despre carte

Autor

Klaus Fuchshofer

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2011

Pagini

108

EAN

9783639340877

ISBN

3639340876

Enbook ID

06840672

Editura

VDM Verlag

Greutate

168

Dimensiuni

152 x 229 x 7

Descriere completă

A requirement to distributed systems is their dependability. Applications expect high availability AND data integrity. Availability is achieved by distributing services and the data on several nodes. Each additional copy increases the effort to guarantee consistency in case of a network failure. When some nodes are unavailable, conventional systems therefore decide to block in order to ensure data consistency. From the applications' point of view, the system is unavailable during a degraded state. DeDiSys (www.dedisys.org) introduces a middleware that achieves increased dependability by trading consistency for availability. This means that certain possible inconsistencies are accepted in a degraded system state and remove them after the failure has been eliminated. From the application's point of view, the system is therefore available during a degraded state. This book describes the part of the middleware that enables applications to accept possible inconsistencies (threats) during a degraded system state, that collects all necessary information and that further on supports the application to the re-establish a consistent state when all nodes of the network are available again.