static void setupConnectionCount(final TestOptions opts) {
    if (opts.oneCon) {
      opts.connCount = 1;
    } else {
      if (opts.connCount == -1) {
        // set to thread number if connCount is not set
        opts.connCount = opts.numClientThreads;
      }
    }
  }
generates splits based on total number of rows and specified split regions
hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/PerformanceEvaluation.java