Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Design and Implementation of iATA-based RAID5 Distributed Storage Servers

iATA 기반의 RAID5 분산 스토리지 서버의 설계 및 구현

  • 왕숙미 (동서대학교 일반대학원) ;
  • 임효택 (동서대학교 컴퓨터정보공학부)
  • Received : 2009.10.01
  • Accepted : 2009.11.30
  • Published : 2010.02.27
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Abstract

iATA (Internet Advanced Technology Attachment) is a block-level protocol developed to transfer ATA commands over TCP/IP network, as an alternative network storage solution to address insufficient storage problem in mobile devices. This paper employs RAID5 distributed storage servers concept into iATA, in which the idea behind is to combine several machines with relatively inexpensive disk drives into a server array that works as a single virtual storage device, thus increasing the reliability and speed of operations. In the case of one machine failed, the server array will not destroy immediately but able to function in a degradation mode. Meanwhile, information can be easily recovered by using boolean exclusive OR (XOR) logical function with the bit information on the remaining machines. We perform I/O measurement and benchmark tool result indicates that additional fault tolerance feature does not delay read/write operations with reasonable file size ranged in 4KB-2MB, yet higher data integrity objective is achieved.

iATA는 TCP/IP 네트워크상에서 ATA 명령어를 전달하기 위해 개발된 블록-레벨 프로토콜로서, 모바일 기기의 스토리지 한계를 극복하기 위한 대안으로 활용 될 수 있다. 본 논문은 RAID5 분산 스토리지 서버 개념을 iATA에 적용하여 스토리지 서버의 신뢰성과 속도를 개선하고자 한다. 분산 스토리지 서버중 하나의 서버가 다운된 경우에 나머지 서버 데이터의 XOR 함수를 적용하여 데이터 회복이 가능하며 이를 통해 데이터의 신뢰성을 높일 수 있다. 벤치마킹 실험과 시험을 통해 제안된 iATA 프로토콜은 제한된 스토리지를 가지고 있는 모바일 기기상에서 효율적이 고도 신뢰성 있는 가상 스토리지 프로토콜로서 사용될 수 있음을 보여주고 있다.

Keywords

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