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SUMMARY:Geo-replicated storage with scalable deferred update replication -
  Fernando Pedone\, University of Lugano
DTSTART:20140616T130000Z
DTEND:20140616T140000Z
UID:TALK52912@talks.cam.ac.uk
CONTACT:Microsoft Research Cambridge Talks Admins
DESCRIPTION:Many current online services are deployed over geographically 
 distributed sites (i.e.\, datacenters). Such services call for geo-replica
 ted storage\, that is\, storage distributed and replicated among many site
 s. Geographical distribution and replication can improve locality and avai
 lability of a service. Locality is achieved by moving data closer to the u
 sers. High availability is attained by replicating data in multiple server
 s and sites. In this talk I will consider a class of highly available stor
 age systems based on deferred update replication. Deferred update replicat
 ion ensures strong consistency and is at the core of several highly availa
 ble storage systems. I will first show how the performance of deferred upd
 ate replication can be made to scale to dozens and potentially hundreds of
  nodes. I will then consider the implications of the approach on user-perc
 eived latency in geographically distributed environments and propose solut
 ions. The talk will conclude with some open problems in the design of stro
 ngly consistent storage systems.
LOCATION:Small Lecture Theatre\, Microsoft Research Ltd\, 21 Station Road\
 , Cambridge\, CB1 2FB
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