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Learn when to permit the book move.

The ideal part about writing an educational article might be the vast collection of subjects you can select from. Whatever the situation, there’sn’t any outstanding judge of whether you may be writing how you must be than you. The crucial performers on the other side of the screen are reputed professional writers using a huge [...]

Learn when to permit the book move.

The ideal part about writing an educational article might be the vast collection of subjects you can select from. Whatever the situation, there’sn’t any outstanding judge of whether you may be writing how you must be than you. The crucial performers on the other side of the screen are reputed professional writers using a huge [...]

Learn when to permit the book move.

The ideal part about writing an educational article might be the vast collection of subjects you can select from. Whatever the situation, there’sn’t any outstanding judge of whether you may be writing how you must be than you. The crucial performers on the other side of the screen are reputed professional writers using a huge [...]

Learn when to permit the book move.

The ideal part about writing an educational article might be the vast collection of subjects you can select from. Whatever the situation, there’sn’t any outstanding judge of whether you may be writing how you must be than you. The crucial performers on the other side of the screen are reputed professional writers using a huge [...]

Learn when to permit the book move.

The ideal part about writing an educational article might be the vast collection of subjects you can select from. Whatever the situation, there’sn’t any outstanding judge of whether you may be writing how you must be than you. The crucial performers on the other side of the screen are reputed professional writers using a huge [...]

Learn when to permit the book move.

The ideal part about writing an educational article might be the vast collection of subjects you can select from. Whatever the situation, there’sn’t any outstanding judge of whether you may be writing how you must be than you. The crucial performers on the other side of the screen are reputed professional writers using a huge [...]

面向NoSQL数据存储的Hibernate对象映射

近日,Hibernate Validator、Hibernate Search等项目的开发者Emmanuel Bernard宣布了Hibernate OGM。这个新框架的目标旨在通过JPA为NoSQL数据存储提供一个公共的接口。OGM是Object Grid Mapping的缩写。

InfoQ有幸采访到了Emmanuel Bernard以深入了解Hibernate OGM以及它将要支持的NoSQL后端存储。Emmanuel说他们将从Infinispan开始,因为团队之间能够更轻松地进行合作,但也将支持其他产品。Infinispan与Hibernate OGM都是JBoss创建的。Infinispan之所以成为第一选择是因为它的事务模型非常类似于关系数据库,可以很容易桥接JPA。

动态Schema的传说

原文地址:http://forchenyun.iteye.com/blog/1018324

众所周知,对于海量数据的schema修改是一个极其昂贵的代价,MySQL分表的很大原因其实就有500w数据一个表,DDL会比较快。

一般来说,动态schema是指的非固定表结构,schema字段(有时也指索引)的增删对于正常的读写没有任何影响。一般有两个方向的表现形式:

Online Schema Change
Schema-Free

NoSQL中一般采用后者,而关系型数据库可能会采用前者,两者的区别是,前者虽然是固定表结构,但是可以通过一定的方式进行在线修改,同时尽可能不影响服务,而后者是原生支持动态schema,是很多NoSQL产品所支持的feature之一,也是它们之于开源关系型数据库的优势所在。下面我将就目前比较通用的动态schema解决方案就一一介绍。

Facebook游戏开发商wooga的架构:基于MySQL和Redis

这是wooga从之前的基于分片(Shard)的MySQL迁移到基于Master/Slave的Redis和MySQL混合的一些经验教训:
原文地址:http://nosql.mypopescu.com/post/4788119911/woogas-architecture-facebook-games-on-mysql-and-redis

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