Distributed lock management for mobile transactions
Distributed lock management for mobile transactions
复制标题
移动交易的分布式锁管理
DOI：
10.1109/icdcs.1995.500010
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
A. Elmagarmid
中科院分区：
文献类型：
--
作者：
Jin Jing;O. Bukhres;A. Elmagarmid
我们提出了一种新的锁管理方案，允许在项目的任何复制站点执行该项目的读解锁；该站点可能不同于在其上设置读锁定的复制站点。该方案利用数据项的复制副本来降低交易主机的移动性带来的消息开销。我们在一个称为O2PL-MT(移动事务的乐观两阶段锁定)的乐观锁定算法中演示了这一思想。与其对应的算法O2PL(乐观两阶段锁定)一样，O2PL-MT根据需要立即授予读锁定，并将写锁定推迟到提交时间。然而，在复制数据项的移动环境中，O2PL-MT需要传输的消息比O2PL少。
We present a new lock management scheme which allows a read unlock for an item to be executed at any copy site of that item; the site may be different from the copy site on which the read lock is set. The scheme utilizes the replicated copies of data items to reduce the message costs incurred by the mobility of the transaction host. We demonstrate this idea in an optimistic locking algorithm called O2PL-MT (Optimistic Two Phase Locking for Mobile Transactions). Like its counterpart algorithm O2PL (Optimistic Two Phase Locking), O2PL-MT grants read locks immediately on demand and defers write locks until the commitment time. However, O2PL-MT requires the transmission of fewer messages than O2PL in a mobile environment in which data items are replicated.