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Summary: Hybrid Message Logging Protocols for Fast Recovery
Sriram Rao, Lorenzo Alvisi, and Harrick M. Vin
Department of Computer Sciences, UTAustin
1 Introduction
Fast recovery has received little attention in the con
text of message logging protocols, which have instead fo
cused on minimizing their overhead during failurefree exe
cutions. As distributed computing becomes commonplace,
and many more applications are faced with the current costs
of high availability, there is a fresh need for recoverybased
techniques that combine high performance during failure
free executions with fast recovery.
As an initial step towards the development of these
new techniques, we have implemented a senderbased pes
simistic protocol [5], a receiverbased pessimistic proto
col [2] and a causal protocol [1] and studied their perfor
mance during recovery [4] 1 .
All of these protocols log (1) the content and (2) the or
der of receipt of each message delivered by each process
during its execution. Processes synchronously log on stable
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