Custom hashing (partitioning) functions

Sean Cribbs sean at
Tue Jan 21 10:25:27 EST 2014


That might indeed be a bug. Would you file it on the issue tracker?

On Mon, Jan 20, 2014 at 3:08 PM, Sargun Dhillon <sargun at> wrote:

> So, I don't know how many people are aware of if, but Riak supports
> custom hashing (partitioning) functions. It's exposed as a bucket
> property (chash_keyfun), in which you can deploy your own code to hash
> keys to ensure data locality to specific vnodes. This can come in
> handy when doing custom mapreduce jobs, riak_pipe, or riak_core
> applications.
> After playing around with this feature set quite a bit recently, it
> seems like there are some places that don't entirely respect this.
> Specifically, the place where I'm looking at right now is
> riak_kv_pipe_get, when try_preflist gets called (if try_partition
> falls through), it falls back to riak_core_util:chash_key (L188), as
> opposed to looking at the riak_pipe chashfun, or the bucket chashfun.
> What's the approach that most people have taken here with custom hash
> functions?
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> riak-users mailing list
> riak-users at

Sean Cribbs <sean at>
Software Engineer
Basho Technologies, Inc.
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