Cloud Tech III has ended

Cloud Tech is the largest gathering of cloud technologists & engineers in the bay area. Our speakers include the top cloud computing entrepreneurs & experts.

Come join us Saturday, October 6th, from 9am to 6pm at the Computer History Museum in Mountain View, CA for a full 8 hours of learning directly from great minds sharing their secrets!

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Special thanks to our sponsors who made this all possible. They are: CloudStack, Scalr, VMware, Rackspace, HP, DataStax, AWS, Canonical, Puppet, and General Catalyst.

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Saturday, October 6 • 12:00pm - 12:45pm
Packet Transport Mechanisms
 for Data Center Networks

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Data centers host diverse applications, mixing workloads that require small predictable latency with others requiring large sustained throughput. In this talk, Mohammad Alizadeh presents measurements from a 6000 server production cluster that reveals impairments with today's state-of-the-art Transmission Control Protocol (TCP) in data center environments. The impairments are rooted in TCP's demands on the limited buffer space available in commodity data center switches. He then discusses Data Center TCP (DCTCP), a new transport mechanism specifically designed for the data center that is now shipping with Windows Server 2012. DCTCP uses a simple modification to the TCP congestion control algorithm that allows it to maintain very low queue occupancy (and latency) in data center switches while simultaneously providing high throughput. Finally, he discusses HULL (for High-bandwidth Ultra-Low Latency), an architecture that builds on DCTCP to deliver baseline fabric latency (only propagation + switching) by nearly eliminating all queueing from the data center fabric.

avatar for Mohammad Alizadeh

Mohammad Alizadeh

Ph.D. Candidate, Stanford
Mohammad is a Ph.D. student in the Electrical Engineering department at Stanford University, working with Prof. Balaji Prabhakar. His research interests are broadly in network algorithms and systems. In particular, he is focused on designing high performance packet transport mec... Read More →

Saturday October 6, 2012 12:00pm - 12:45pm
Lovelace Computer History Museum

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