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. We designed our 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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 234-244 |
| Number of pages | 11 |
| Journal | Conference Proceedings - Annual International Symposium on Computer Architecture, ISCA |
| State | Published - 1994 |
| Externally published | Yes |
| Event | Proceedings of the 21st Annual International Symposium on Computer Architecture - Chicago, IL, USA Duration: Apr 18 1994 → Apr 21 1994 |
ASJC Scopus subject areas
- Hardware and Architecture