Title :
RAID-II: a high-bandwidth network file server
Author :
Drapeau, Ann L. ; Shirriff, Ken W. ; Hartman, John H. ; Miller, Ethan L. ; Seshan, Srinivasan ; Katz, Randy H. ; Lutz, Ken ; Patterson, David A. ; Lee, Edward K. ; Chen, Peter M. ; Gibson, Garth A.
Author_Institution :
Div. of Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
In 1989, the RAID (Redundant Arrays of Inexpensive Disks) group at U.C. Berkeley built a prototype disk array called RAID-I. The bandwidth delivered to clients by RAID-I was severely limited by the memory system bandwidth of the disk array´s host workstation. They designed their second prototype, RAID-II, to deliver more of the disk array bandwidth to file server clients. A custom-built crossbar memory system called the XBUS board connects the disks directly to the high-speed network, allowing data for large requests to bypass the server workstation. RAID-II runs Log-Structured File System (LFS) software to optimize performance for bandwidth-intensive applications. The RAID-II hardware with a single XBUS controller board delivers 20 megabytes/second for large, random read operations and up to 31 megabytes/second for sequential read operations. A preliminary implementation of LFS on RAID-II delivers 21 megabytes/second on large read requests and 15 megabytes/second on large write operations
Keywords :
file organisation; file servers; magnetic disc storage; memory architecture; redundancy; RAID; RAID-I; RAID-II; Redundant Arrays of Inexpensive Disks; XBUS board; crossbar memory system; high-bandwidth; high-speed network; memory system bandwidth; network file server; performance; server workstation; Bandwidth; File servers; File systems; High-speed networks; Network servers; Prototypes; Software performance; Software prototyping; Software systems; Workstations;
Conference_Titel :
Computer Architecture, 1994., Proceedings the 21st Annual International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-5510-0
DOI :
10.1109/ISCA.1994.288146
