mergePolicy.setUseCompoundFile(false);
conf.setMergeScheduler(mergeScheduler.getMergeScheduler());
DirectoryReferenceCounter referenceCounter = new DirectoryReferenceCounter(directory, gc, closer);
// This directory allows for warm up by adding tracing ability.
TraceableDirectory dir = new TraceableDirectory(referenceCounter);
SimpleTimer simpleTimer = new SimpleTimer();
simpleTimer.start("writerOpen");
_writer = new BlurIndexWriter(dir, conf, true);
simpleTimer.stop("writerOpen");