Olivia

Olivia

Olivia is essentially a distributed hash table that I built to test out some weird ideas I've had about Go and distributed programming that I've had.

What is Olivia

Olivia is essentially just a distributed hash table with added goodies. From early on, I wanted to use bloomfilters to enhance lookup speed between different remote nodes and I'm fairly happy with how that's turned out. Bloom filters allow us to prioritize which nodes we'll request keys from, rather than blindly sending out requests to all known nodes.

What Olivia could become

I'm still not 100% sure on the end vision. When I originally started out building this thing, I just wanted three things:

• Distribution
• Remote key lookups (consistency between each node has never been huge)
• Key Expiration

As I build it, however, my desired are changing. I now want consistency between nodes, but I haven't yet decided how I'll go about it. Olivia was originally intended to be part of a distributed torrent tracker network, but it is no longer a worthwhile pursuit, as distributed hash tables (as a part of the Bittorrent network) are able to be edited (upon BEP acceptance).

Running an Olivia Node

Real quick and easy steps to run a node:

  1. git clone https://github.com/GrappigPanda/Olivia
  2. cd Olivia
  3. go get ./...
  4. go build
  5. ./Olivia

These 5 commands will get a base level node running, where the node runs, accepts commands, and will allow incoming connections from other Olivia nodes. To run a network of nodes, please see the config file and change a grand total of 3 variables.

An example workflow.

  $ nc 127.0.0.1 5454
  SET key1:value1,key2:value2,key3:value3
  :SAT key1:value1,key2:value2,key3:value3
  GET key2
  :GOT key2:value2

This is a really simple workflow, but it shows that setting keys/retrieving keys is simple.

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License

The MIT License (MIT)

Copyright (c) 2016 Ian Clark

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.