Network traffic within a business is usually directed by routers or switches that can process a limited amount of information at any given moment. The DSM solves another problem inherent in IP networks. The device can recognize different types of network traffic and can be configured to set aside a certain amount of bandwidth for those applications. "They're going to gobble up all that available bandwidth and you won't be able to do a video session, a voice session, or a critical application." "Let's say people are downloading a bunch of files," says McCullough. It's a great system for transferring files but doesn't work very well for videoconferencing and other rich media applications like voice over IP where users need a constant flow of data to ensure optimal performance. The device, which uses technology patented by PacketStream, solves a long-standing problem with IP networks: Bandwidth is usually shared among all the users on a network, with the user most in need of that bandwidth using the current available capacity. "It's pretty advanced technology in the sense that, to a very fine level of detail, it can manage a customer's bandwidth based on what applications it wants to see go through or what end users it wants to see go through," says PacketStream's director of marketing Don McCullough. The DSM allows network managers to guarantee performance of selected applications or uses by prioritizing network traffic in real time. The company has kept a low profile while working towards the release of the DSM but made its public debut at a recent trade show. The company, which currently employs 20, has been located in Hacienda since its founding in 1999. The user is required to reassign the read method to call another function,įor example, the write method of another stream.PacketStream, a Hacienda startup dedicated to improving the performance of Internet Protocol (IP) computer networks, has released its first product, the Dynamic Stream Manager (DSM). read isįor data coming out of the stream, and write is for data going in. Weird-stream have two methods - read and write. Means that the entire implementation could fit into 100 lines,Ĭorrection 200 lines now that there is full error checking, and close More normal streams and using simple message oriented streams write ( 'open - write to stream' ) weird streams Var packets = require ( 'packet-stream' ) var A = packets ( stream. To how the user thinks - like muxrpc Example This is a low level module that implements the core logic necessary for an rpcĪnd multiplexing module - it is intended to be wrapped in something closer So therefore packet-stream provides messages as the fundamental building block,Īnd implements request/response (async+callback) and streams (a sequence of messages) Shouldn't tcp be implemented on top of packets?Īny useful node api needs streams, but also needs callbacks and maybe events too. Is tcp implemented on top of tcp, but is this really the right approach? Modules are implemented, rpc or multiplexer, you'll see one thing:įramed messages are sent over a stream. Which had better support for binary, as was later wrapped to a moreīut something still wasn't right. This worked pretty well, although it felt like a messy glue job. Which used mux-demux and rpc-stream to create remote access to a leveldb instance. When leveldb came around, juliangruber wrote multilevel Unfortunately, mux-demux used json encoding, and so did not support binary very well. You could now stream many different things through one connection. Which supported streams but not callbacks. Than dnode, but could be piped over any node stream - this soon came to dnode. Was first - which supported async callbacks, but not streams. Many approaches to rpc and to multiplexing. Over the course of streams and so on with node, there have been A simpler approach to rpc/multiplexing proir work
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