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SUMMARY:Queues don’t matter when you can Jump them! - Matthew P. Grosven
 or\, University of Cambridge Computer Laboratory
DTSTART:20150501T140000Z
DTEND:20150501T150000Z
UID:TALK58430@talks.cam.ac.uk
CONTACT:Microsoft Research Cambridge Talks Admins
DESCRIPTION:In this talk I will be discussing our recent system called QJu
 mp. QJump is a simple and immediately deployable approach to controlling n
 etwork interference in datacenter networks. Network interference occurs wh
 en congestion from throughput-intensive applications causes queueing that 
 delays traffic from latency-sensitive applications. \n\nTo mitigate networ
 k interference\, QJump applies Internet QoS-inspired techniques to datacen
 ter applications. Each application is assigned to a latency sensitivity le
 vel (or class). Packets from higher levels are rate-limited in the end hos
 t\, but once allowed into the network can “jump-the-queue” over packet
 s from lower levels. In settings with known node counts and link speeds\, 
 QJump can support service levels ranging from strictly bounded latency (bu
 t with low rate) through to line-rate throughput (but with high latency va
 riance). \n\nWe have implemented QJump as a Linux Traffic Control module. 
 QJump achieves bounded latency and reduces in-network interference by up t
 o 300×\, outperforming Ethernet Flow Control (802.3x)\, ECN (WRED) and DC
 TCP. We also show that QJump improves average flow completion times\, perf
 orming close to or better than DCTCP and pFabric.
LOCATION:Auditorium\, Microsoft Research Ltd\, 21 Station Road\, Cambridge
 \, CB1 2FB
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