public static float getWaitForRatio(Configuration conf) {
    if (waitForRatio < 0) {
      // System property takes precedence over configuration setting
      if (System.getProperty(HBASE_TEST_WAIT_FOR_RATIO) != null) {
        waitForRatio = Float.parseFloat(System.getProperty(HBASE_TEST_WAIT_FOR_RATIO));
      } else {
        waitForRatio = conf.getFloat(HBASE_TEST_WAIT_FOR_RATIO, HBASE_WAIT_FOR_RATIO_DEFAULT);
      }
    }
    return waitForRatio;
  }
Returns the 'wait for ratio' used in the {@link #sleep(Configuration, long)},
{@link #waitFor(Configuration, long, Predicate)},
{@link #waitFor(Configuration, long, long, Predicate)} and
{@link #waitFor(Configuration, long, long, boolean, Predicate)} methods of the class
<p/>
This is useful to dynamically adjust max time out values when same test cases run in different
test machine settings without recompiling & re-deploying code.
<p/>
The value is obtained from the Java System property or configuration setting
<code>hbase.test.wait.for.ratio</code> which defaults to <code>1</code>.
@param conf the configuration
@return the 'wait for ratio' for the current test run.
hbase-common/src/test/java/org/apache/hadoop/hbase/Waiter.java