Mike Freedman and I have known each other since we were Masters students at MIT, working on things like the Tarzan anonymizing network (a parallel, pre-cursor to Tor). He went on to build the hugely successful (”as seen on Slashdot”) Coral content distribution network, which figured largely in his dissertation. It’s a great [...]
Justin Cappos received his PhD from the University of Arizona under the supervision of John Hartman. I met Justin several years ago at a PlanetLab Consortium meeting when he was starting to work on Stork, a system to simplify package deployment. He is currently a Post Doc at the University of Washington working [...]
After my last post on implementing Chord, I thought it might be insightful and educational to examine how others are building research distributed systems. I have asked a number of colleagues who have built successful research systems to answer a few questions about their implementations. Here, successful roughly means that the system has [...]
The Chord protocol dynamically constructs robust and scalable overlay networks that map a given key to an active node. The MIT PDOS Chord implementation has served as a reference implementation of Chord, and over the years has accumulated many tweaks and improvements. While the theoretical highlights have largely been documented in our publications, [...]
Today, VMware co-founder Mendel Rosenblum gave a Deuterzos Lecture at MIT titled The Impact of Virtualization on Modern Computing Environments. His talk outlined the general function of virtualization as an interposing layer between the hardware and the operating system, and the evolution of functionality in this layer over the past decade—in short, the talk [...]
When a graduate student completes their PhD, the software they wrote for that degree begins an almost inexorable decline into obscurity. Other things become more important and, unless that code serves as a platform for further research or has spun off into a startup, there is precious little time to maintain and further develop [...]
Seen via High Scalability, this seems related to my Chord/DHash work — Ringo: Distributed key/value storage for immutable data. A cursory glance at the Erlang source (a language I don’t actually know), suggests that Ringo does simple successor only routing. I think it uses something like Merkle synchronization trees though there are also [...]
Pierre-Evariste Dagand developed Opis, an OCaml-based framework for developing distributed systems. It includes yet another Chord implementation, tested in ModelNet against Macedon and MIT Chord. While I still think OCaml is kind of ugly, it appeals to me more than P2 or Macedon did. (via Anarchaia)
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