| 摘要 |
A method and system for maintaining consistency between a view of a virtual table and the database. The method includes: First, selecting a discard candidate instance from a discard candidate list table in accordance with an LRU algorithm if it is judged that there is less free space for adding an instance. Then, judging whether a revision wait flag is on for the discard candidate instance. If it is judged that the revision wait flag is on, deleting the discard candidate instance from the discard candidate list table. If it is judged that the revision wait flag is not on, deleting the discard candidate instance from the instance pool and adding the instance to the instance pool. Lastly, adding the requested instance to the instance pool if it is judged that there is enough storage area.
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