LUN CACHE method for FC-SAN memory system |
Title： |
| LUN CACHE method for FC-SAN memory system |
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Application Number： |
200310113532 |
Application Date： |
2003/11/14 |
Announcement Date： |
2004/11/10 |
Pub. Date： |
2006/10/11 |
Publication Number： |
1545033 |
Announcement Number： |
1279455 |
Grant Date： |
2006-10-11 |
Granted Pub. Date： |
2006-10-11 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G06F 12/06 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Shu Jiwu, Zheng Weimin, Liu Tianmiao |
Key Words： |
LUN CACHE method, FC-SAN, memory system |
Abstract： |
The invention is an LUN CACHE method for an FC-SAN storage subsystem, and its character: it is implemented by a logic unit number cache (LUN CACHE) module operating in an embedded system of I/O processing nodes in the FC-SAN; it uses an improved CACHE displacement arithmetic to enhance the utilization ratio of CACHE, so as to complete the read-write operation in the I/O processing nodes by caching but not sending to a concrete SCSI device; uses a delayed write technique to update the data on the background, extremely improving the repose time; uses a mechanism of read-write lock to ensure a consistency of data sharing among multiple users; makes the LUN CACHE completely transparent for a user by the good design of interface devices. It is tested that the read-write operation performance is extremely enhanced by using the LUN CACHE than before. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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