본 논문에서는 이동 컴퓨터 등에서 사용되는 플래시 메모리 관리를 위해 새로운 순위별 지움 정책을 제안하고 성능평가를 실시한다. 지움 정책의 일반적인 역할은 플래시 메모리 공간의 어디를 언제 지울 것인가를 결정한다. 제안된 순위별 지움 정책은 지우는 비용과 한정된 지움 회수를 고려하여 지우는 공간과 시간을 결정함으로써 플래시 메모리의 수명을 최대한 연장하고 플래시 메모리 접근 및 관리의 성능을 항상 시킨다. 제안된 방법은 기존의 방법에 비해 저장 연산 수행에서 10%$\sim$50%의 성능 향상을 보인다.
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