发明授权
- 专利标题： Tablespace-relative database pointers
- 专利标题（中）： 表空间相对数据库指针
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申请号： US08865693申请日： 1997-05-30
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公开(公告)号： US06272503B1公开(公告)日： 2001-08-07
- 发明人: William H. Bridge, Jr. , Jonathan D. Klein , J. William Lee , Juan R. Loaiza , Alex Tsukerman , GianFranco Putzolu
- 申请人： William H. Bridge, Jr. , Jonathan D. Klein , J. William Lee , Juan R. Loaiza , Alex Tsukerman , GianFranco Putzolu
- 主分类号： G06F1730
- IPC分类号： G06F1730
摘要：
A database containing datafiles is partitioned into a set of tablespaces. Every disk pointer pointing to a data item in a datafile refers to a tablespace-relative file number for the datafile. Data pointed to by a tablespace-relative disk pointer is retrieved by first checking the cache, and upon a cache miss, the tablespace-relative file number is translated into an absolute file number according to a latch-free look up technique.
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