Data distribution dynamic mapping method based on magnetic disc characteristic |
Title： |
| Data distribution dynamic mapping method based on magnetic disc characteristic |
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Application Number： |
200310113529 |
Application Date： |
2003/11/14 |
Announcement Date： |
2004/11/10 |
Pub. Date： |
2006/06/07 |
Publication Number： |
1545030 |
Announcement Number： |
1258713 |
Grant Date： |
2006-6-7 |
Granted Pub. Date： |
2006-6-7 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G06F 12/00G06F 12/08G06F 7/22 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Shu Jiwu, Zheng Weimin, Wu Hao |
Key Words： |
Data distribution, dynamic mapping, magnetic disc, characteristic |
Abstract： |
The invention a step dynamic data mapping method based on disk characteristics, and its character: it is a method which is executed by a storage management controller in a fiber channel-storage area network (FC-SAN), takes data blocks as mapping particle size, and dynamically maps in the logic and physical spaces. In a write requirement, it selects a physical disk with minimum load according to recent busy extent and number of data copy. It redistributes physical addresses to logic addresses; after combining write requirements reasonably, it searches an idle data block in the physical disk according to a shortest access time optimization method which gives consideration to both channel addressing time and rotary delay, to take the address of the idle data block as the physical address of the write requirement to execute the write requirement and complete the dynamic logic address-physical address mapping. It enhances the utilization ratio of single disk time, balances the loads between the disks, and enhances the whole performance of the system. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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