http://hbase.apache.org/acid-semantics.html Apache HBase (TM) is not an ACID compliant database. However, it does guarantee certain specific properties. This specification enumerates the ACID properties of HBase. Definitions For the sake of common vo…
原文地址:http://www.javacodegeeks.com/2015/07/mysql-vs-mongodb.html 1. Introduction It would be fair to say that as IT professionals we are living in the golden age of data management era. As our software systems become more complex and more distributed,…
My name is Charles Humble and I am here at QCon New York 2014 with Ian Robinson. Ian, can you introduce yourself to the InfoQ community? Hello, I am Ian Robinson, I am engineer at Neo Technology, I am based in London and I work on the Neo4j graph dat…
Part I-An introduction to transactions If you look at any introductory article or book on J2EE, you'll find only a small portion of the material devoted to the Java Transaction Service (JTS) or the Java Transaction API (JTA). This is not because JTS…
官方文档地址:http://www.rabbitmq.com/documentation.html A RabbitMQ broker is a logical grouping of one or several Erlang nodes, each running the RabbitMQ applicationand sharing users, virtual hosts, queues, exchanges, etc. Sometimes we refer to the collect…
本文内容为转载,重新排版以供学习研究.如有侵权,请联系作者删除. 转载请注明本文出处:Professional C# 6 and .NET Core 1.0 - 37 ADO.NET ------------------------------- What's In This Chapter? Connecting to the database Executing commands Calling stored procedures The ADO.NET object model Wrox.…
在写完上一篇<Pull or Push>之后,原本计划这一片写<存储层设计>,但是临时改变主意了,想先写一篇介绍一下消息中间件最最基础也是最核心的部分:write-ahead logging(WAL). 什么是WAL "In computer science, write-ahead logging (WAL) is a family of techniques for providing atomicity and durability (two of the ACID…
The CAP theorem asserts that any networked shared-data system can have only two of three desirable properties. However, by explicitly handling partitions, designers can optimize consistency and availability, thereby achieving some trade-off of all…
最近研究内存关系数据库的设计与实现,下面一篇为berkeley db原始两位作为的Berkeley DB设计回忆录: Conway's Law states that a design reflects the structure of the organization that produced it. Stretching that a bit, we might anticipate that a software artifact designed and initially produ…
Brewer's CAP Theorem 原文地址:http://www.julianbrowne.com/article/brewers-cap-theorem Brewer’s (CAP) Theorem So what exactly is Brewer’s Theorem, and why does it warrant comparison with a 1976 punk gig in Manchester? Brewer’s 2000 talk was based on his t…
UPDATE: the source code for DbContextScope is now available on GitHub: DbContextScope on GitHub. A bit of context This isn't the first post that has been written about managing the DbContext lifetime in Entity Framework-based applications. In fact, t…
原文地址:http://i.cnblogs.com/EditPosts.aspx?opt=1. I wrote a first version of this posting on consistency models about a year ago, but I was never happy with it as it was written in haste and the topic is important enough to receive a more thorough trea…
http://msdn.microsoft.com/en-us/library/azure/jj870962.aspx Microsoft Azure virtual machines (VMs) with SQL Server can help lower the cost of a high availability and disaster recovery (HADR) database solution. Most SQL Server HADR solutions are suppo…
应该说搞分布式系统必读的文章了,转过来,这是2008年12月Werner revise过的版本,先贴上内容简介:分布式系统的CAP理论 CAP理论(data consistency, system availability, and tolerance),也就是数据一致性,系统可用性和网络分区容错性,在一个分布式系统中CAP是不能同时保证的,最多只能同时满足两个.如果一个系统不必考虑网络分区容错性,那么它可以同时取得数据一致性和可用性,这通常可以通过处理协议来保证. 然而不考虑网络分区容错…
We have classified the architecture of SQL Server into the following parts for easy understanding − General architecture Memory architecture Data file architecture Log file architecture General Architecture Client − Where the request initiated. Query…
