| Presentation | 1995/12/11 Performance Evaluation of Hot Mirrored Disk Arrays on Disk Failure Kazuhiko MOGI, Masaru KITSUREGAWA, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently RAID has attracted strong attention as a high performance and high reliable secondary storage system. For the loads which consist of a large number of small accesses, RAID level 1 (mirrored disk arrays) and RAID level 5 (RAID5 disk arrays) are the best suited among several RAID levels. The major drawback of RAID5 disk arrays is, however, in the large overhead incurred for small writes and the significant performance degradation on disk failure, which is caused by introducing parity encoding for redundancy. Mirrored disk arrays have also problems. They have considerably smaller storage capacity than that of RAID5 disk arrays because they make a copy of all the disk blocks for redundancy. In order to get not only higher performance but also larger capacity, we propose the storage management scheme named "hot mirroring", which combines the mirror scheme and the RAID5 scheme. There is alway localities in the disk accesses. Frequently accessed data is stored in the mirrored area. Non-frequently accessed data is stored in RAID5. In this paper we examine the performance of disk arrays with hot mirroring, especially on disk failure. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Disk Array / RAID5 / Mirror / Secondary Storage |
| Paper # | CPSY95-82,DE95-68 |
| Date of Issue |
| Conference Information | |
| Committee | CPSY |
|---|---|
| Conference Date | 1995/12/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Computer Systems (CPSY) |
|---|---|
| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance Evaluation of Hot Mirrored Disk Arrays on Disk Failure |
| Sub Title (in English) | |
| Keyword(1) | Disk Array |
| Keyword(2) | RAID5 |
| Keyword(3) | Mirror |
| Keyword(4) | Secondary Storage |
| 1st Author's Name | Kazuhiko MOGI |
| 1st Author's Affiliation | Institute of Industrial Science, University of Tokyo() |
| 2nd Author's Name | Masaru KITSUREGAWA |
| 2nd Author's Affiliation | Institute of Industrial Science, University of Tokyo |
| Date | 1995/12/11 |
| Paper # | CPSY95-82,DE95-68 |
| Volume (vol) | vol.95 |
| Number (no) | 407 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |