HLRC는 LRC의 변종으로 DSM 분야에 있어 최근에 제안된 모델이다. HLRC는 여러 장점을 가지고 있지만 단점 또한 존재한다.이러한 단점 중 하나는 작은 크기의 영역을 보호하기 위해 락을 사용하는 경우에 매우 성능이 떨어진다는 것이다. 불행히도 이러한 형태의 락 사용은 가장 일반적인 것이기 때문에 락을 사용하는 응용프로그램에 있어 HLRC는 일반적으로 나쁜 성능을 보이게 된다. 본 논문에서는 HLRC를 위한 효율적인 락 프로토콜을 제안한다. 제안하는 프로토콜은 락 허가 시 임계구역 내에서 사용 될 페이지에 대해 선택적으로 diff를 전달하여 갱신을 한다. 이때 전송할 diff의 최대 크기를 제한함으로써 diff의 누적현상의 발생을 최소화한다. 제안한 락 프로토콜은 임계구역 내에서의 원격 페이지 요청을 줄이며 이것은 락 대기 시간 및 메시지 전송량의 감소로 이어진다. 5개의 벤치마크 응용 프로그램을 사용하여 성능을 측정한 결과 기존의 HLRC에 비해 2%~40%의 성능향상을 얻었다.
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