leveled_bookie:status/1

[hmmr]

This implements martinsumner#478.

When called here, it returns a map containing reportable items described in the issue above.

(dev2@127.0.0.1)12> riak_kv_vnode:vnode_status(riak_core_vnode_manager:all_index_pid(riak_kv_vnode)).
[{1347321821914426127719021955160323408745312813056,
  [{backend_status,riak_kv_leveled_backend,
                   #{ledger_cache_size => 4,
                     journal_last_compaction_result => {0,0.0},
                     get_sample_count => 0,get_body_time => 0,
                     head_sample_count => 0,head_rsp_time => 0,
                     put_sample_count => 0,put_prep_time => 0,put_ink_time => 0,
                     put_mem_time => 0}},
   {vnodeid,<<"}ÍyرYdå">>},
   {counter,140003},
   {counter_lease,150000},
   {counter_lease_size,10000},
   {counter_leasing,false}]},
...

Not all items can be available at the time of calling, in which case the backend_status will not include the corresponding keys.

In riak_control, the results will show as follows:

[hmmr]

Marking as WIP pending work on the last item ("Mean level for recent fetches").