Riak vs riak_core

Ryan Zezeski rzezeski at gmail.com
Wed Mar 30 21:02:01 EDT 2011


Mike,

Riak (to be specific, riak-kv) it built atop riak-core.  The Basho devs
recognized that a lot of the things that made riak-kv great were more
general than just key-value storage.  This includes things like consistent
hashing, virtual nodes, hinted handoff, etc.  They built riak-core as a
foundation to build Dynamo based apps.  You could use riak-core to build a
distributed computing cluster (i.e. no data, just for distributing work).
 One example, a pretty original one I might add too, is Rusty's BashoBanjo
which uses riak-core to power a "distributed orchestra." [1]

I think riak-core has a lot of potential beyond it's current usage and I'm
working on a small but not completely trivial example that I hope to
illustrate with a blog post.  Specifically, I want to focus on the mechanics
of the "vnode" as this, AFAICT, is the main player when you want to leverage
riak-core.  Consider this a teaser to make sure I follow thru on my word :)

-Ryan

[1]: https://github.com/rklophaus/BashoBanjo

On Wed, Mar 30, 2011 at 8:46 PM, Mike Oxford <moxford at gmail.com> wrote:

> I thought I understood Riak, then I ran across the fact that riak_core was
> split out separately.
>
> When would you use riak_core that you wouldn't use Riak?  Is it more
> ephemeral, with shared state
> in an ETS ring compared to a storage-backed node?
>
> Thanks...
>
> -mox
>
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