Simple open source DHT implementation in Java for learning purposes

Question

I'm looking for recommendations for a simple open source implementation of a Distributed Hash Table in Java to play around with. No fancy features, just for learning purposes, no production functionality needed. It should be simple to set up (e.g. 1 physical machine with n-JVMs) and well documented preferably with some examples, tutorials or starting guides.

Research yields these candidates: FreePastry and OpenChord but I'm not fully convinced they meet my criteria simplicity-wise.

Have you got any experience with these or other implementations? Recommendations?

Thanks & adios

score 11 · Answer 1 · answered Mar 26 '12 at 01:17

11

There is TomP2P on Github.

answered Mar 26 '12 at 01:17

Vincent Cantin

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Looks best to me as of 2015: active development and lots of commiters on github, more than 50 forks, android support. – sulai Feb 13 '15 at 11:18

Prof. Falken · Accepted Answer · 2017-07-21T21:12:16.140

5

Maybe JDHT will fit the bill. I haven't checked it out myself, but it's written at a university, sometimes that means it's simple and used for teaching. :-)

edited Jul 21 '17 at 21:12

answered May 13 '11 at 08:11

Prof. Falken

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Broken link to JDHT. I googled around a bit to try and find if it moved, but its not easy to find. Maybe project is dead. At leasts its 'footprint' on the internet seems to indicate so. – Kris Jul 17 '16 at 22:29

score 4 · Answer 3 · answered Mar 30 '14 at 04:29

4

I have been working on an implementation of Kademlia lately. It's very simple to setup and use and it's well documented. There are several tests written that demonstrate the different functionality as well as a starting guide in the Readme.md file itself.

answered Mar 30 '14 at 04:29

Joshua Kissoon

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I forked your repo just now but I can't seem to find your test sources. – Alvin Reyes Feb 22 '18 at 13:40

score 1 · Answer 4 · answered Aug 26 '11 at 15:06

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You can use openkad

answered Aug 26 '11 at 15:06

eyal

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Looks dead. The download link takes you to an empty folder on google drive. – Kris Jul 17 '16 at 22:28

score 0 · Answer 5 · answered Jul 27 '12 at 14:06

I started with free pastry..I've had a great experience with it. It was very simple to set up and run a ring of nodes. I've been mainly using PAST (File storage) and its been quite easy to get running. I'd suggest having a look at the PAST tutorial here. https://trac.freepastry.org/wiki/tut_past

The code is over simplified in my opinion but you say that is all you need so I guess thats ok.

Simple open source DHT implementation in Java for learning purposes

5 Answers5

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