Wednesday, September 28, 2005 Note Special Day
A unified theory of replication would yield two significant benefits. First, providing a set of the right core abstractions would dramatically simplify the design and deployment of new systems. Second, cleanly separatng mechanism from policy would provide better performance/availability/consistency trade-offs than are now available to existing "point-solution" systems.
Our initial experience with PRACTI suggests that both benefits may be significant. The PRACTI mechanisms subsume a broad range of existing replication architectures and have allowed us to quickly construct a number of interesting replication systems. And, not only are replication systems easier to build under PRACTI, we have often been able to make dramatically better performance trade-offs than made by existing systems: for workloads of interest, our PRACTI design dominates existing approaches by providing an order of magnitude better bandwidth and storage efficiency than replicated server systems (AC-TI), an order of magnitude better synchronization cost compared to hierarchical systems (PR-AC), and consistency guarantees not achievable by per-object replication systems (PR-TI).
HOST: Haifeng Yu
VISITOR COORDINATOR: , 8-6716
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