RAID-II: A Scalable Storage Architecture for High-Bandwidth Network

  • Authors:
  • Edward K Lee;Peter M Chen;John H. Hartman;Ann L. C Drapeau;Ethan L. Miller;Randy H. Katz;Garth A. Gibson;David A. Patterson

  • Affiliations:
  • -;-;-;-;-;-;-;-

  • Venue:
  • RAID-II: A Scalable Storage Architecture for High-Bandwidth Network
  • Year:
  • 1992

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Abstract

RAID-II (RAID the second) is a scalable high-bandwidth network file server for heterogenous computing environments characterized by a mixture of high-bandwidth scientific, engineering and multi-media applications and low-latency high-transaction- rate UNIX applications. RAID-II is motivated by three observations: applications are becoming more bandwidth intensive, the I/O bandwidth of workstations is decreasing with respect to MIPS, and recent technological developments in high-performance networks and secondary storage systems make it economical to build high-bandwidth network storage systems. Unlike most existing file servers that use a bus as a system backplane, RAID-II achieves scalability by treating the network as the system backplane. RAID-II is notable because it physically separates file service, the management of file metadata, from storage service, the storage and transfer of file data; stripes files over multiple storage servers for improved performance and reliability; provides separate mechanisms for high-bandwidth and low-latency I/O requests; implements a RAID level 5 storage system; and runs LFS, the Log- Structured File System, which is specifically designed to support high-bandwidth I/O and RAID level 5 storage systems.