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Full-Text Articles in Physical Sciences and Mathematics
Cooperative Leases: Scalable Consistency Maintenance In Content Distribution Networks, Anoop Ninan, Purushottam Kulkarni, Prashant Shenoy, Krithi Ramamritham, Renu Tewari
Cooperative Leases: Scalable Consistency Maintenance In Content Distribution Networks, Anoop Ninan, Purushottam Kulkarni, Prashant Shenoy, Krithi Ramamritham, Renu Tewari
Computer Science Department Faculty Publication Series
In this paper, we argue that cache consistency mechanisms designed for stand-alone proxies do not scale to the large number of proxies in a content distribution network and are not flexible enough to allow consistency guarantees to be tailored to object needs. To meet the twin challenges of scalability and flexibility, we introduce the notion of cooperative consistency along with a mechanism, called cooperative leases, to achieve it. By supporting ∆-consistency semantics and by using a single lease for multiple proxies, cooperative leases allows the notion of leases to be applied in a flexible, scalable manner to CDNs. Further, the …
Maintaining Temporal Coherency Of Virtual Datawarehouses, Raghav Srinivasan
Maintaining Temporal Coherency Of Virtual Datawarehouses, Raghav Srinivasan
Computer Science Department Faculty Publication Series
In Electronic Commerce applications such as stock trading, there is a need to consult sources available on the web for informed decision making. Because information such as stock prices keep changing, the web sourcesmust be queried continually to maintain temporal coherency of the collected data, thereby avoiding decisions based on stale information. However, because network infrastructure has failed to keep pace with ever growing web traffic, the frequency of contacting web servers must be kept to a minimum. This paper presents adaptive approaches for the maintenance of temporal coherency of data gathered from web sources. Specifically, it introduces mechanisms to …