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SUMMARY:Why Johnny Can't Use the Cloud: And What We Can Do about It - Hite
 sh Ballani (MSR Cambridge)
DTSTART:20111020T150000Z
DTEND:20111020T160000Z
UID:TALK31264@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:The shared nature of the network in today's multi-tenant datac
 enters implies that network performance for tenants can vary significantly
 . This applies to both production datacenters and cloud environments. Netw
 ork performance variability hurts application performance which makes tena
 nt costs unpredictable and causes provider revenue loss. Motivated by thes
 e factors\, in this talk I will make the case for extending the tenant-pro
 vider interface to explicitly account for the network. This can be achieve
 d by providing tenants with a virtual network connecting their compute ins
 tances. To this effect\, I will describe virtual network abstractions that
  capture the trade-off between the performance guarantees offered to tenan
 ts\, their costs and the provider revenue. \n\nTo illustrate the feasibili
 ty of virtual networks\, we have developed Oktopus\, a system that impleme
 nts the proposed abstractions.  I will present the Oktopus design and brie
 fly discuss evaluation results showing that our abstractions enable a symb
 iotic tenant-provider relationship with significant benefits for both enti
 ties.\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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