Muhammad Rizwan [email protected] Department of Computer Engineering University of Engineering and Technology Taxila, Pakistan Abstract: Atomic commit protocols are used where data integrity is more important than data availability. Two-Phase commit (2PC) is a standard commit protocol for commercial database management systems. To reduce certain drawbacks in 2PC protocol people h...

Many applications need transaction-consistent pictures of past states of the database. These applications use the commit t ime of the transaction i o timestamp the data. When a transaction is distributed, the cohorts must vote on a commit t ime and the coordinator must choose a commit t ime based on the votes of the cohorts. This implies that timestamps are applied after commit. Until the times...

DEFINITION The 2-phase commit (2PC) protocol is a distributed algorithm to ensure the consistent termination of a transaction in a distributed environment. Thus, via 2PC an unanimous decision is reached and enforced among multiple participating servers whether to commit or abort a given transaction, thereby guaranteeing atomicity. The protocol proceeds in two phases, namely the prepare (or voti...

We developed two new EOS additions to the TOUGH+ family of codes, the RealGasH2O and RealGas. The RealGasH2O EOS option describes the non-isothermal two-phase flow of water and a real gas mixture in a gas reservoir (including a tight/shale gas one). The gas mixture is treated as either a single-pseudocomponent having a fixed composition, or as a multicomponent system composed of up to 9 individ...

With the unit interval [0,1] as the truth value table, Chen and Wupresented the concept of  possibility computation over dcpos.Indeed, every possibility computation can be considered as a[0,1]-valued Scott open set on a dcpo. The aim of this paper is tostudy Chen-Wu's duality on quantale-valued setting. For clarity,with a commutative unital quantale $L$ as the truth value table, weintroduce a c...

A signi cant body of literature is available on distributed transaction commit protocols. Surprisingly, however, the relative merits of these protocols have not been studied with respect to their quantitative impact on transaction processing performance. In this report, using a detailed simulation model of a distributed database system, we pro le the transaction throughput performance of a repr...

Distributed database systems use commit protocols to ensure atomicity in case of distributed transactions and a wide variety of commit protocols have been proposed so far. Two–phase commit (2PC) is a widely accepted standard protocol for distributed transactions. But 2PC suffer from blocking problem due to which three-phase commit (3PC) protocol was proposed which is an extension of 2PC. This p...