A transaction system using the strict two-phase locking protocol is considered, based on the assumption of independent renewal processes for the sequences of requests and transactions of each user. Simple upper bounds of the probabilities of blocking and deadlock situations are derived, including ...
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...
MySQL: LOCK IN SHARE MODE 小结 2PL封锁协议用在大部分的DBMS中。 能够自动在多个事务中协调,并为每个事务生成一个正确的执行序列,可以通过如下方式: Locks + protocol(2PL,SS2PL,…) Deadlock detection + handling Deadlock prevention 本节对应教材PDF...
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 ...
-phase commit to handle special transaction communications patterns. Three popular ones are reinfection, to handle a transaction that revisits a resource manager after the two-phase commit protocol has started; transfer of coordination, to enable one participant to use one-phase commit; and phase ...
The Sufficiency Condition of the Two-Phase Locking without Deadlock一个两段加锁不死锁的充分条件两段加锁并发控制死锁回滚两段加锁是分布式系统中最广泛使用的并发控制算法.该算法除实现较为复杂外,其致命弱点是容易产生死锁.本文在分析两段加锁产生死锁原因的基础上,给出了一个不会产生死锁的两段加锁方法的...
DeadlockConcurrency ControlDatabase TransactionSynonyms Locking protocol ; Isolation ; Conflict serializability ; Pessimistic schedulerSynonymsLocking protocol ; Isolation ; Conflict serializability ; Pessimistic schedulerLocking protocolIsolationConflict serializabilityPessimistic schedulerDefinition A locked transaction is...
美 英 un.二相封锁法 网络二相锁定;阶段锁定 英汉 网络释义 un. 1. 二相封锁法
An almost universally accepted way to ensure atomicity is to use a strict two-phase locking protocol with a rollback scheme for recovery in case of deadlock or failure. In this note, we argue that this method is not the most economical way to achieve this end. We develop a Dependency ...
Index Terms-Deadlock, open queueing network model, residence time, two-phase locking, wait-timedoi:10.1534/genetics.103.020016Modeling and detecting nonallelic (epistatic) effects at multiple quantitative trait loci (QTL) often assume that the study population is in zygotic equilibrium (i.e., ...