write-ahead log

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• Write ahead logging — In computer science, write ahead logging (WAL) is a family of techniques for providing atomicity and durability (two of the ACID properties) in database systems.In a system using WAL, all modifications are written to a log before they are applied …   Wikipedia

• Write Ahead Physical Block Logging — provides meta data journaling for file systems in conjuction with Fast File System (FFS) to accomplish rapid filesystem consistency after an unclean shutdown of the filesystem. And better general use performance over regular FFS. [cite… …   Wikipedia

• Log-structured file system — A log structured filesystem is a file system design first proposed by John K. Ousterhout and Fred Douglis. Designed for high write throughput, all updates to data and metadata are written sequentially to a continuous stream, called a log.… …   Wikipedia

• PostgreSQL — Developer(s) PostgreSQL Global Development Group Stable release 9.1.1[1] / 9.0.5 …   Wikipedia

• Two-phase commit protocol — In computer networking and databases, the two phase commit protocol (2PC) is a distributed algorithm that lets all nodes in a distributed system agree to commit a transaction. The protocol results in either all nodes committing the transaction or …   Wikipedia

• Microsoft SQL Server — Developer(s) Microsoft Stable release SQL Server 2008 R2 (10.50.2500.0 Service Pack 1) / July 11, 2011; 4 months ago …   Wikipedia

• Virtual synchrony — is an interprocess messaging passing (sometimes called event queue management) technology. Virtual synchrony systems allow programs running in a network to organize themselves into process groups , and to send messages to groups (as opposed to… …   Wikipedia

• Extensible Storage Engine — For JET Red storage engine of Microsoft Access, see Microsoft Jet Database Engine. For the teacher s term, Exceptional education. Extensible Storage Engine (ESE), also known as JET Blue, is an Indexed Sequential Access Method (ISAM) data storage… …   Wikipedia

• Comparison of file systems — The following tables compare general and technical information for a number of file systems. Contents 1 General information 2 Limits 3 Metadata 4 Features …   Wikipedia

• Commit de dos fases — Este artículo o sección necesita referencias que aparezcan en una publicación acreditada, como revistas especializadas, monografías, prensa diaria o páginas de Internet fidedignas. Puedes añadirlas así o avisar …   Wikipedia Español

• ACID — For other uses, see Acid (disambiguation). In computer science, ACID (atomicity, consistency, isolation, durability) is a set of properties that guarantee database transactions are processed reliably. In the context of databases, a single logical …   Wikipedia