| Presentation | 2003/4/11 Fast Shared Disk Switching Methods on Hot-Standby System Masaya ICHIKAWA, Takaaki HARUNA, Kenta NINOSE, Yuzuru MAYA, Hideaki SANPEI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose two high-availability methods which support shorter switching time of the shared disks in a hot-standby system. The pseudo-offline method traps a device driver call in each I/O request, and then executes the control routine which determines whether it calls the device driver or not. The control group method classifies the shared disks into a few groups, and controls access to all disks in the same group simultaneously. In existing methods, since they are necessary to issue I/O (Input/Output) for switching shared disks, the switching time is proportional to the number of the shared disks. Then it takes ten and several seconds to switch the shared disks and the whole switching time becomes tens of seconds. In the proposed methods, it is not necessary to issue any I/O requests, the switching time does not depend on the number of the shared disks. We implement the proposed methods in HA Booster, a middleware which boosts system availability. We evaluate Hitachi HA Booster Pack for AIX^1, and verify that it takes only a few milliseconds constantly to switch the shared disks, and the whole switching time becomes shorter than twenty seconds in our evaluation environment. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | hot-standby system / high-availability / fail over / shared disk / on-line transaction processing |
| Paper # | CPSY2003-4,DC2003-4 |
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| Conference Information | |
| Committee | DC |
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| Conference Date | 2003/4/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Dependable Computing (DC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fast Shared Disk Switching Methods on Hot-Standby System |
| Sub Title (in English) | |
| Keyword(1) | hot-standby system |
| Keyword(2) | high-availability |
| Keyword(3) | fail over |
| Keyword(4) | shared disk |
| Keyword(5) | on-line transaction processing |
| 1st Author's Name | Masaya ICHIKAWA |
| 1st Author's Affiliation | Hitachi Ltd., Systems Development Laboratory() |
| 2nd Author's Name | Takaaki HARUNA |
| 2nd Author's Affiliation | Hitachi Ltd., Systems Development Laboratory |
| 3rd Author's Name | Kenta NINOSE |
| 3rd Author's Affiliation | Hitachi Ltd., Systems Development Laboratory |
| 4th Author's Name | Yuzuru MAYA |
| 4th Author's Affiliation | Hitachi Ltd., Systems Development Laboratory |
| 5th Author's Name | Hideaki SANPEI |
| 5th Author's Affiliation | Hitachi Ltd., Software Division |
| Date | 2003/4/11 |
| Paper # | CPSY2003-4,DC2003-4 |
| Volume (vol) | vol.103 |
| Number (no) | 19 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |