BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Unveiling the Secrets of High-Performance Datacenters - Michael Sc
 hapira\, Hebrew University of Jerusalem
DTSTART:20150402T090000Z
DTEND:20150402T100000Z
UID:TALK58432@talks.cam.ac.uk
CONTACT:Microsoft Research Cambridge Talks Admins
DESCRIPTION:Many architectures for high-performance datacenters have been 
 proposed to meet the ever-growing traffic demands. Surprisingly\, recent s
 tudies show that random datacenter topologies outperform much more sophist
 icated designs\, achieving near-optimal throughput and bisection bandwidth
 \, high resiliency to failures\, incremental expandability\, high cost eff
 iciency\, and more. While this highlights the suboptimality of existing da
 tacenters\, the inherent unstructuredness and unpredictability of random d
 atacenter topologies pose obstacles to their adoption in practice. Can the
 se guarantees be achieved by well-structured\, deterministic datacenter ar
 chitectures? We provide a surprising affirmative answer to this question. 
 We show\, through a combination of theoretical analyses\, extensive simula
 tions\, and experiments with e network emulator\, that any network topolog
 y that belongs to the extensively studied class of “expander graphs” (
 as indeed do random graphs) comes with these benefits\, and more\, thus op
 ening a new avenue for highperformance datacenter design: turning ideas fr
 om the rich literature on deterministically constructing expander graphs i
 nto an operational reality. We leverage these insights to propose novel de
 terministic datacenter architectures that achieve all of the above desider
 ata\, and significantly outperform traditional datacenter designs. We disc
 uss challenges en route to deploying expander datacenters (e.g.\, cabling\
 , routing) and explain how these can be resolved. Our results suggest that
  the key to future progress on designing high-performance datacenters lies
  in exploring design tradeoffs within the space of expander datacenters.
LOCATION:Auditorium\, Microsoft Research Ltd\, 21 Station Road\, Cambridge
 \, CB1 2FB
END:VEVENT
END:VCALENDAR