[syntern]

I have briefly checked the Riak yokozuna project, and it really looks great. Nevertheless, I'd prefer to have the data storage cluster and the search cluster to be separated (and I really like ElasticSearch too).

Edit: I shall add that the most interesting search problems are the ones where you need to join separate data sources, and in such cases it is not really the question of what kind of search solution you are using, rather what kind of async queue and data update you have. So the separated cluster is really about having a distributed queue between the 'data-master' and the 'search-master'.

[rch]

How about Riak CS for storage, separate from the search cluster?

[syntern]

I am not sure what difference it makes to have Riak or Riak CS for data storage, in the context of having a separate search cluster. Would you elaborate?

[rch]

Yokozuna and CS (or plain Riak) use different backend configurations[0,1]. So beyond having physically distinct clusters, you'd get to have purpose optimized storage, but with a common management regime.

[0] http://docs.basho.com/riak/latest/ops/building/planning/back...

[1] http://docs.basho.com/riakcs/latest/cookbooks/configuration/...