Download e-book for kindle: Database Replication by Bettina Kemme, Ricardo Jiménez Peris, Marta Patiño-Martínez,

By Bettina Kemme, Ricardo Jiménez Peris, Marta Patiño-Martínez, M. Tamer Özsu

ISBN-10: 1608453812

ISBN-13: 9781608453818

Database replication is customary for fault-tolerance, scalability and function. The failure of 1 database copy doesn't cease the method from operating as on hand replicas can take over the initiatives of the failed copy. Scalability may be accomplished by means of allotting the burden throughout all replicas, and including new replicas may still the weight elevate. ultimately, database replication delivers quick neighborhood entry, whether consumers are geographically dispensed consumers, if info copies can be found on the subject of consumers. regardless of its benefits, replication isn't really an easy strategy to practice, and there are various hurdles to beat. on the vanguard is copy regulate: assuring that information copies stay constant whilst updates ensue. There exist many choices in regard to the place updates can ensue and while adjustments are propagated to information copies, how adjustments are utilized, the place the replication software is found, and so on. a specific problem is to mix copy regulate with transaction administration because it calls for numerous operations to be taken care of as a unmarried logical unit, and it offers atomicity, consistency, isolation and sturdiness around the replicated procedure. The booklet presents a categorization of reproduction regulate mechanisms, provides numerous reproduction and concurrency keep watch over mechanisms intimately, and discusses a number of the concerns that come up whilst such ideas have to be carried out inside of or on best of relational database structures. desk of Contents: evaluation / 1-Copy-Equivalence and Consistency / simple Protocols / Replication structure / The Scalability of Replication / keen Replication and 1-Copy-Serializability / 1-Copy-Snapshot Isolation / Lazy Replication / Self-Configuration and Elasticity / different points of Replication

Show description

Read Online or Download Database Replication PDF

Best storage & retrieval books

Implementing J.D. Edwards OneWorld - download pdf or read online

The publication offers a very good historical past for the JDE newcomer. The e-book has sections which are solid for the administrative sponsor and transitions into element strong for these really integrating. whereas no longer whatever that might make sure a profitable implementation, the ebook covers an important variety of key concerns and dangers that are supposed to aid businesses during the implementation approach.

Semantic Digital Libraries by Sebastian Ryszard Kruk PDF

Libraries have consistently been an notion for the criteria and applied sciences constructed by way of semantic internet actions. even if, apart from the Dublin center specification, semantic net and social networking applied sciences haven't been extensively followed and extra constructed by way of significant electronic library projects and tasks.

Get Community Building on the Web : Secret Strategies for PDF

What makes an internet site an online neighborhood? How have websites like Yahoo, iVillage, eBay, and AncientSites controlled to draw and hold a faithful following? How can internet builders create becoming, thriving websites that serve a big functionality in people's lives? neighborhood construction on the internet introduces and examines 9 crucial layout thoughts for placing jointly bright, welcoming on-line groups.

Download PDF by Avigdor Gal: Uncertain Schema Matching

Schema matching is the duty of supplying correspondences among innovations describing the that means of information in a variety of heterogeneous, disbursed facts resources. Schema matching is without doubt one of the easy operations required via the method of knowledge and schema integration, and hence has an exceptional influence on its results, no matter if those contain unique content material supply, view integration, database integration, question rewriting over heterogeneous resources, replica info removing, or automated streamlining of workflow actions that contain heterogeneous facts resources.

Extra resources for Database Replication

Example text

Application processes can join/leave the group by submitting a join/leave request. Furthermore, the group communication layer detects process failures and automatically removes the failed processes from the group. Every time that there is a change in the membership due to a join/leave or a failure, each available application process receives a view change message informing it about the membership of the new view. Multicast. Reliable multicast allows sending a message to all available group members.

In pure partial replication each node has only copies of a subset of the data items but no node contains a full copy of the database. In this case, it is possible that a transaction accesses a set of data items such that no node has copies of all of them. Thus, distributed transaction processing needs to be supported. This is complex as it requires exact knowledge of where data items reside. Also, the typical client interface for relational databases are SQL based, and SQL select statements can translate to read operations on many data items.

Therefore, this execution is not possible under strict 2PL 1 . • A third property is that 1-copy-atomicity is easily provided if there are no failures because at commit time all update operations have successfully executed at all replicas. Therefore, the commit will succeed at all replicas. • In order to handle failures, some extensions are necessary. First, if a replica fails, a failure detection mechanism needs to inform all surviving nodes. Second, active transactions that were local on the failed replica have to be terminated properly.

Download PDF sample

Database Replication by Bettina Kemme, Ricardo Jiménez Peris, Marta Patiño-Martínez, M. Tamer Özsu

by David

Rated 4.04 of 5 – based on 34 votes