Leases: an efficient fault-tolerant mechanism for distributed file cache consistency.

Authors:
Cary G. Gray;David R. Cheriton
Affiliations:
-;-
Venue:
Leases: an efficient fault-tolerant mechanism for distributed file cache consistency.
Year:
1990

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Abstract

Caching introduces the overhead and complexity of ensuring consistency, reducing some of its performance benefits. In a distributed system, caching must deal with the additional complications of commumcation and host failures. Leases are proposed as a time-based mechanism that provides efficient consistent access to cached data in distributed systems. Non-Byzantine failures affect performance, not correctness ,with their effect minimized by short leases. An analytic model and an evaluation for file access in the V system show that leases of short duration provide good performance. The impact of leases on performance grows more significant in systems of larger scale and higher processor performance.