I have a bucket which contains images refernced by a key which is made up from a guid. I have a number of servers in my cluster and my bucket is set up to store 3 versions of every item in the bucket across the servers in the cluster. I'd like to understand a little bit more about how my cluster is performing in terms of data storage. I can find out how much space each bitcask is currently taking up on each server, but I'd like to compare reference this against the number of unique keys that are being stored in the system.
I've tried to use map-reduce methods using the erlang methods defined in the riak_kv_mapreduce, calling them against the HTTP interface but my queries are timing out. I've tried to extend the timeout, but it's still timing out. What's the most efficient way to find out how many keys exist in a particular bucket?
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