| 摘要 |
Incremental reorganization of hash tables includes a copy phase and a clean phase. In the copy phase, used entries from an alternate hash table (AHT) are copied to a current hash table (CHT). During copying, hash table operations are allowed to access both tables. In the clean phase, entries in the AHT are marked as empty, and hash table operations are allowed to access only the CHT. Once all used entries have been copied from the AHT to the CHT, the clean phase begins. Once all entries in the AHT have been marked as empty during the clean phase, the two tables are switched and the copy phase begins. The copying or cleaning occurs with every hash table operation, a number of hash table operations, or a number based on analysis of recent hash table operations. Copying also occurs by avoiding copying of deleted or expired entries in the AHT. The present invention is suited to use in multithreaded real-time systems.
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