| 摘要 |
<p>According to the invention, there is provided a multi-mode locking system for transaction processing, including four modes of commit locking, such as a share lock, an update lock, a commit lock, and an exclusive lock. Transaction lock requests are queued according to a predetermined protocol, and may be upgraded under certain conditions. A system according to the invention may be used, for example, to perform a single-block logical operation without acquiring an update lock.</p> |
