On Thu, Jan 26, 2012 at 6:27 AM, <riak-users-requ...@lists.basho.com> wrote:
> Input = {index, Bucket, Index, Key},
> IdentityQuery = [{reduce,
> {modfun, riak_kv_mapreduce, reduce_identity},
> [{reduce_phase_only_1, true}],
> true}],
>
> My queries can return hundreds of thousands of keys.
>
Using reduce_phase_only_1 is probably not the best of ideas with hundreds
of thousands of keys. You are better off distributing the count to each
node, then summing the results in a final reduce.
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