发明名称 |
Effects of prefetching on I/O requests in an information processing system |
摘要 |
A data look-ahead control is provided to realize a high cache hit rate and improves responsiveness in an information processing system. In the data look-ahead control, when it is determined that the current input/output request is an access to a specific database that was the subject of a recent input/output request and whose I/O count exceeds a predetermined value, and it is also determined that a cache memory can be occupied to some extent and that there would be no impact on other input/output requests, data including one or more blocks (logical tracks) larger than a block that is the subject of the current I/O request are loaded to the cache memory.
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申请公布号 |
US7035980(B2) |
申请公布日期 |
2006.04.25 |
申请号 |
US20030628784 |
申请日期 |
2003.07.28 |
申请人 |
HITACHI, LTD. |
发明人 |
KUROKAWA ISAMU;NAKANISHI HIROAKI;MUTO JUNICHI;TAKEUCHI HISAHARU;KAWAGUCHI MASAHIRO |
分类号 |
G06F12/00;G06F3/06;G06F12/08;G06F12/14;G06F12/16;G06F13/00;G06F13/28 |
主分类号 |
G06F12/00 |
代理机构 |
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代理人 |
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地址 |
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