Distributed Memory/ Objects

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Hi folks,

I'm searching for a distributed memory library, likely in C++ but C# or Java is also ok, which is not SQL-like, in other words, where the memory is stored on each peer in the network and wehen you change a object inside one peer the memory of all other peers should also change automaticly.
Also it would be nice if the library would allow custom classes as distributed objects.
I seached a while but it seems like there isn't something like that out there.

IDominator

Posted 21-Dec-13 3:45am

IDominator

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Sampath Lokuge 21-Dec-13 9:55am

Do you need distributed memory caching kind of thing or what ?

Ron Beyer 21-Dec-13 10:19am

Is this something you've seen before, or something you hope exists?

IDominator 21-Dec-13 13:25pm

I hope it exists... I have only seen library's that work sql-like

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Leonardo Paneque · Answer 1 · 2013-12-21T10:03:00

Solution 1

I think you can use a distributed hashtable.

https://github.com/sit/dht/wiki[^]

this is a c# implementation

http://sourceforge.net/projects/nchord/[^]

Posted 21-Dec-13 10:03am

Leonardo Paneque

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IDominator 22-Dec-13 9:55am

Thank you for your answer. But thats not the solution I search, as the data is distributed across the whole cloud. what I need is that all peers have all data in their own memory and the only messages that they send are the changes the peers make in the memory.
I think this concept is not distributed nor shared memory... I hope something like this exists.

[no name] 22-Dec-13 14:34pm

Of course it exists.
First, it is easy to modify a distributed hashtable to not split across all nodes but just replicate across them.

But also you might want to try distributed cache. Microsoft AppFabric will do that.(was called Velocity time ago).

IDominator 22-Dec-13 16:01pm

http://www.codeproject.com/Tips/96984/How-to-Enable-Local-Cache-When-Using-Velocity-Micr
This is almost it. But again it is sql-like, so the memory and the processes that want acess it are seperate and have to comunicate through the network

[no name] 23-Dec-13 11:13am

I dont understand what you mean by "sql-like".

appFabric is not sql-like (no matter what that is :) ), its a cache mechanism. It might store in sql in the backend, but again, is not SQL-like. You can even use it without sql at all.

If you want "distributed memory" you can use a distributed hashtable and modify the redundancy parameter. that's it :) of course at that time it will be behave more like a 'replicated hashtable' than a distributed one.

IDominator 23-Dec-13 11:22am

That's it :D I need replicated memory. Do you know a good framework for this, which would also delta-compress it for me?

[no name] 23-Dec-13 12:15pm

Dont know about delta compression, but a few things will do what you want.
1) a distributed hashtable with 'redudancy' parameter set to N (N is the number of nodes) so each node will have everything.
2) something like Couchbase or a memcached API
The reason why you have a hard time finding something like this, is because nobody wants to replicate everything N times. even couchbase and memcached are DHTs-likes.

they will also work faster than if you replicate all the data all the time.

IDominator 23-Dec-13 18:26pm

I think I found a framework: http://www.replicanet.com/home
I hope it is what I've searched for.