public static ReplicationGroupOffset parse(String str) {
    int index = str.lastIndexOf(':');
    return new ReplicationGroupOffset(str.substring(0, index),
      Long.parseLong(str.substring(index + 1)));
  }
A negative value means this file has already been fully replicated out
hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationGroupOffset.java