private long buildVersion() {
    long currentTime = this.time.milliseconds();
    UUID uuid = UUID.randomUUID();
    return currentTime * VERSION_BASE + Long.parseLong(uuid.toString().split("-")[0], 16) % VERSION_BASE;
  }
Build the version for Named Blob row based on timestamp and uuid postfix.
@return a long number whose rightmost 5 digits are uuid postfix, and the remaining digits are current timestamp
ambry-named-mysql/src/main/java/com/github/ambry/named/MySqlNamedBlobDb.java