Reliable multicast experiments
This project contains experiments in using multicasting to synchronise participants in a distributed topic. Participants take on one or more of three roles:
copyin: a publisher of content. Transmits messages until it receives an acknowledgement from a
copyout: a receiver of content. Handles received messages, detecting gaps in the message stream and requesting retransmissions from a
copyack: a store of responsibility for message delivery. Takes responsibility from
copyins by acknowledging their publications, and ensures
copyouts have what they need by responding to their replay requests. Stores a copy of every message seen so far.
Areas of investigation
timing: acknowledgement and retransmission schedules; batching; replay-storm avoidance
cache expiry policies
protocol for joining and leaving the ring
The code in this project is open-source
code, licensed under the very liberal MIT
license, with the
priority_queue.erl, which are
licensed as detailed in the files themselves.
Copyright (c) 2009 Tony Garnock-Jones <email@example.com> Copyright (c) 2009 LShift Ltd. <firstname.lastname@example.org> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.