높은 가용성, 확장성, 시스템 성능의 요구를 만족시키기 위해 SAN(Storage Area Network)이 등장했다. 대부분의 SAN 운영 S/W들은 SAN을 보다 효과적으로 활용하기 위해서 SAN에 부착된 물리적 저장장치들을 가상적으로 하나의 커다란 볼륨으로 보이게 하는 저장장치 가상화 개념을 지원한다. 저장장치 가상화의 핵심적인 역할을 하는 것이 바로 논리볼륨 관리자이다. 논리볼륨 관리자는 논리주소를 물리주소로 매핑 시킴으로서 저장장치 가상화를 실현한다. 이 논문에서는 논리볼륨 관리자를 위한 효율적이고 유연한 매핑기법을 설계하고 구현한다. 더불어 매핑 테이블 기반 매핑 방법에서 유연한 매핑을 돕기 위한 자유공간 관리기법을 설계하고 구현한다. 이 논문의 매핑기법은 특정 시점의 볼륨이미지를 유지할 수 있는 스냅샷과 시스템을 정지시키지 않고 SAN에 저장장치를 추가 또는 삭제할 수 있는 온라인 재구성 기능을 지원한다. 또한 이 논문에서 제안한 기법에 대한 성능 평가를 수행하여 제안하는 기법이 매핑 관리자로서 의미가 있음을 보인다.
KSP Keywords
Storage area network
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