@Override
    public String separator() {
      return ",";
    }
A SplitAlgorithm that divides the space of possible keys evenly. Useful when the keys are
approximately uniform random bytes (e.g. hashes). Rows are raw byte values in the range <b>00
=&gt; FF</b> and are right-padded with zeros to keep the same memcmp() order. This is the
natural algorithm to use for a byte[] environment and saves space, but is not necessarily the
easiest for readability.
hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java