网络两段锁协议 网络释义 1. 两段锁协议 离散数学介绍 - zhiyinjixu - 博客园 ... 8.6两段锁协议the Two-Phase Locking Protocol8.7 封锁的粒度 Granularity of lock ... www.cnblogs.com|基于 1 个网页
2PL(two-phase locking) protocolmulti-versionconcurrency controlextended compatibility lockcooperative design 两阶段封锁协议多版本并发控制扩充相容性封锁协作设计The defects of current distributed concurrency control protocol were analyzed. Then, a multi-version twophrase locking protocol was proposed based on ...
The Sufficiency Condition of the Two-Phase Locking without Deadlock 一个两段加锁不死锁的充分条件 www.ilib.cn 4. Multiversion two-phase locking concurrency control protocol in parallel real-time database systems 并行实时数据库系统多版本两阶段封锁并发控制协议 www.ilib.cn 5. Multi-version two-phase...
如果所有要调度的事务,都按照Two-Phase Locking的方式来进行,即满足Two-Phase Locking Protocol,那么可以保证所有事务的Serializability。这个是可以证明的,利用反证法简单说明一下: 如果一组调度的事务不能串行化,就表示执行顺序有环(Serializability的定义),假设有3个事务,T1/T2/T3,都满足2PL,但执行顺序为T1->T2-...
Two-Phase Locking Synonyms Locking protocol;Isolation;Conflict serializability;Pessimistic scheduler Definition A locked transaction is a transaction which, in addition to read and write actions, contains lock and unlock operations to the data items. Lock and unlock operations enable a database system ...
A locking protocol is a set of rules governing the manner in which the database entities may be accessed. Such a protocol usually employs several kinds of locks. Most of the previous work in this area has assumed that once a transaction acquires a particular kind of lock on a data item ...
compareitwithotherrelatedprotocols.Theresultsofexperimentsindicatethattheprotocolperformswellasexpected. KeywordsMRTDB;multiversionconcurrencycontrol;twophaselockingconcurrencycontrol;priority 随着无线通信技术和便携式设备的飞速发展, 人们希望能随时随地获取自己需要的数据.面对这 种需求,基于固定主机和有线网络的分布式数据...
1) Two Version two-phase lock 两版本两阶段锁 2) multiversion two-phase locking protocol 多版本两阶段封锁协议 3) two-phase locking multiversion protocol 两阶段封锁多版本协议 4) 2-SL 两阶段锁 5) 2PL(two-phase locking) protocol 两阶段封锁协议 ...
Two-Phase Locking Locks alone are not sufficient for preventing conflicts. A concurrency control strategy must define how locks are being acquired and released because this also has an impact on transaction interleaving. For this purpose, the 2PL protocol defines a lock management strategy for ensuri...
Two-Phase Locking 2PL 是一种并发控制协议,它帮助数据库在运行过程中决定某个事务是否可以访问某条数据,并且 2PL 的正常工作并不需要提前知道所有事务的执行内容,仅仅依靠已知的信息即可。 2PL,顾名思义,有两个阶段:growing 和 shrinking: 在growing 阶段中,事务可以按需获取某条数据的锁,lock manager 决定同意...