Hi all, Overlay Weaver 0.9.7 is available.
Overlay Weaver: An Overlay Construction Toolkit http://overlayweaver.sf.net/ It is a library and an emulation toolkit for (structured) overlays. >From the last announce in May 2008 it has been enhanced much. I would appreciate if you are interested in them. Follows are extracted topics: October 26, 2009 Version 0.9.7 released. * Jetty was updated from 6.1.20 to 7.0.0. September 20, 2009 Version 0.9.6 released. * Emulator supports event-driven emulation, not only real time emulation. It works suplying --eventdriven option to owemu command. Note that in event-driven mode commands run serially, not in parallel. May 17, 2009 Version 0.9.4 released. * Web interface of DHT shell can show a routing path on a geographical map (Google Maps). Screenshots and demo page has screenshots. Nodes on PlanetLab shows such a map: http://pl.shudo.net:3998/ May 1, 2009 Version 0.9.2 released. * Emulator uses thread pools to exploit parallelism between "control" commands. * Kinds of useful thread pool implementations (ow.util.concurrent.*) were provided. * Overload / clock-jump detection and adaptation mechanisms were improved. April 18, 2009 Version 0.9.1 released. * Confirmed that an Emulator can host 250,000 nodes with 7550 megabytes of heap (java -Xmx7550m). More nodes will be able to run and being tested. March 31, 2009 Demonstration videos provided on the "Screenshots, Video and Demo" page. * "Overlay Visualizer" * "DNS Emulation with over 500 nodes on PlanetLab" December 7, 2008 Version 0.9 released. * Provides an Overlay-Weaver-based memcached implementation (bin/owmemcached). It is rather a technology demonstration than practical one today. * A DHT shell can run as an OASIS-enabled service (web site) with a --oasis option. We can reach a node on PlanetLab via http://oweaver.nyuld.net:3998/. May 6, 2008 Version 0.8.4 released. * Messaging service for Emulator can add communication latency to each message delivery. Kazuyuki Shudo 2...@shudo.net http://www.shudo.net/ > Message-Id: <20060117.002110.424245970.sh...@aist.go.jp> > Subject: [p2p-hackers] Overlay Weaver: An Overlay Construction Toolkit > From: sh...@computer.org > Date: Tue, 17 Jan 2006 00:21:10 +0900 (JST) > I'm pleased to announce the initial release of Overlay Weaver. > > Overlay Weaver: An Overlay Construction Toolkit > http://overlayweaver.sf.net/ > > It supports overlay algorithm designers in addition to application > developers. > > For application developers, the toolkit provides a common API for > higher-level services such as distributed hashtable (DHT) and > multicast. Applications relying on the common API depend no specific > transport protocol, database implementation and routing algorithm. > > The toolkit provides multiple routing algorithms, Chord, Kademlia, > Pastry and Tapestry. These algorithms could be implemented only in > hundreds lines of code because of routing layer decomposition. Routing > layer under the higher-level services has been decomposed into > multiple components, routing driver, routing algorithm and messaging > service. The decomposition also facilitates implementation of a new > algorithm. A newly implemented algorithm can be tested, evaluated and > compared on emulator, which can host thousands of virtual nodes It > enables large-scale emulation and fair comparison between algorithms. > > Features: > > - Implemented in Java 5. > (except part of IPv4 multicast router which is in C.) > > - Provides multiple routing algorithms, Chord, Kademlia, Pastry and Tapestry. > > - Two routing drivers respectively performing iterative and recursive routing > work with all routing algorithm (except recursive routing with Kademlia). > > - Provides a distributed environment emulator. It has demonstrated > that it can host 4000 (virtual) nodes on a single 32 bit computer > with 1 GB memory. > > - There are multiple implementations of communication layer, > with UDP, TCP and emulated messaging layer. > Note that the UDP implementation does UDP hole punching. > > - A visualization tool, Messaging Visualizer provided. > It shows nodes and communications just in time > and works both on the emulator and a real network. > > There are screenshots and a demonstration provided on the web site. > Please take a look. > > We have written a paper but now it's in Japanese. I will prepare an > English paper in few months. > > We'd appreciate activities utilizing this toolkit such as application > development, algorithm researches, testbed construction and operation. > We'll support them. Please contact us or subscribe a mailing list. > > Thanks, _______________________________________________ p2p-hackers mailing list p2p-hackers@lists.zooko.com http://lists.zooko.com/mailman/listinfo/p2p-hackers
