Riak config for vumi-go in /etc/riak/

app.config

DEFAULT:
{storage_backend, riak_kv_bitcask_backend},

CHANGE TO:
{storage_backend, riak_kv_eleveldb_backend},

DEFAULT:
 %% Riak Search Config
 {riak_search, [
                %% To enable Search functionality set this 'true'.
                {enabled, false}
               ]},

CHANGE TO:
 %% Riak Search Config
 {riak_search, [
                %% To enable Search functionality set this 'true'.
                {enabled, true}
               ]},