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SUMMARY:Depot:  from Byzantine fault tolerance to eventual consistency in 
 a single system - Allen Clement\, Max Planck Institute for Software System
 s 
DTSTART:20131126T113000Z
DTEND:20131126T123000Z
UID:TALK49098@talks.cam.ac.uk
CONTACT:Microsoft Research Cambridge Talks Admins
DESCRIPTION:Cloud services such as S3\, EC2 and Azure are increasingly use
 d by companies large and small as replacements for local compute and stora
 ge infrastructure.   While this can offer significant savings\, it is not 
 without risk as data stored with a third party could be lost or corrupted 
 thanks to misconfigurations\, operator error\, or simply going out of busi
 ness.   Byzantine fault tolerant replication promises to solve these probl
 ems\, but the $3f+1$ replication requirements are both prohibitive and unt
 enable.\n\nIn this talk I will present Depot\, a system for replicating da
 ta across multiple potentially Byzantine third party service providers wit
 h substantially fewer than $3f+1$ replicas.  The key observation facilitat
 ing this reduction in replication requirements is a fundamental symmetry b
 etween Byzantine behavior and concurrent executions\, hinting that eventua
 l consistency can be leveraged to tolerate Byzantine behavior at low cost.
 \n\n
LOCATION:Auditorium\, Microsoft Research Ltd\, 21 Station Road\, Cambridge
 \, CB1 2FB
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