Parallel update transactions
نویسندگان
چکیده
منابع مشابه
Using Versions in Update Transactions
This paper proposes an extension of the multiversion two phase locking protocol, called EMV2PL, which enables update transactions to use versions while guaranteeing the serializability of all transactions. The use of the protocol is restricted to transactions, called write-then-read transactions that consist of two consecutive parts: a write part containing both read and write operations in som...
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Multicore main-memory databases only obtain parallel performance when transactions do not conflict. Conflicting transactions are executed one at a time in order to ensure that they have serializable effects. Sequential execution on contended data leaves cores idle and reduces throughput. In other parallel programming contexts—not serializable transactions— techniques have been developed that ca...
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The rule-based update language ULTRA has been designed for the specification of complex database updates in a modular fashion. The logical semantics of update goals is based on update request sets, which correspond to deferred basic updates in the database. The declarative character of the logical semantics leaves much freedom for various evaluation strategies, among them a top-down resolution,...
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Several commercial distributed database systems provide an optional protocol that defers updates of replicas in order to attain higher transaction throughput. Each replicated data item is assigned a primary copy site, and has a set of sites with secondary copies. Typically, in a deferred update protocol, a transaction directly updates only the primary copy of each data item it modiies. After th...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 1990
ISSN: 0304-3975
DOI: 10.1016/0304-3975(90)90013-8