protected AbstractColumnFamilyRecordWriter(Configuration conf) {
   this.conf = conf;
   this.ringCache = new RingCache(conf);
   this.queueSize =
       conf.getInt(
           AbstractColumnFamilyOutputFormat.QUEUE_SIZE, 32 * FBUtilities.getAvailableProcessors());
   batchThreshold = conf.getLong(AbstractColumnFamilyOutputFormat.BATCH_THRESHOLD, 32);
   consistencyLevel = ConsistencyLevel.valueOf(ConfigHelper.getWriteConsistencyLevel(conf));
 }