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SUMMARY:Queues don’t matter when you can JUMP them! - Matthew Grosvenor 
 (University of Cambridge)
DTSTART:20150326T150000Z
DTEND:20150326T160000Z
UID:TALK56658@talks.cam.ac.uk
CONTACT:Eiko Yoneki
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.\n\nBio: Matthew P. Grosv
 enor is a final year PhD student at the University of Cambridge Computer L
 aboratory. He holds bachelors degrees in Mechatronic Engineering and Compu
 ter Science from the University of New South Wales in Sydney Australia. Hi
 s interests lie in cross-layer optimizations of networks and operating sys
 tems\, with a particular focus on netowk latency. He has completed researc
 h internships at NICTA (Sydney)\, Microsoft Research (Silicon Valley) and 
 Microsoft Research (Cambridge). Before moving to Cambridge\, Matthew worke
 d an embedded systems engineer at the high-frequency trading firm Zomojo P
 ty Ltd.\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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