anchor.diff:  cberl_test(Config) ->
       ?PERFORMANCE(Config, [
           {repeats, 100},
  -        {success_rate, 100},
  +        {success_rate, 95},
           {parameters, [
               ?PERF_PARAM(ops_list, [store, store_durable, get, get_empty],
                   "", "List of operations on cberl"),
  
positive.code:     Repeats = ?config(repeats, Config),
      SingleClient = ?config(single_client, Config),
  
      Timeout = timer:seconds(120),
      [Worker | _] = ?config(cluster_worker_nodes, Config),
      Self = self(),
  
  
negative.code:         ?PERF_CFG(single_client, [
              [{name, procs_per_op}, {value, 50}],
              [{name, batch_size}, {value, 1000}],
              [{name, repeats}, {value, 10}]
          ]),
          ?PERF_CFG(many_clients, [
              [{name, procs_per_op}, {value, 1}],
  