【数据库理论】 ACID和BASE的比较
传统关系型数据库系统的事务都有ACID的属性,即原子性(Atomicity)、一致性(Consistency)、隔离性(Isolation,又称独立性)、持久性(Durability)。英文为:Atomic: Everything in a transaction succeeds or t...
关于NoSQL,你必须知道的九件事
本文提到的列表来源于一篇文章,文章标题是关系型数据库使用者必须知道的一些NoSQL知识。其中总结的九点NoSQL与RDBMS的区别联系非常不错。NoSQLFan为大家翻译在此。理解ACID与BASE的区别(ACID是关...
【转载】NoSQL的现状
【转载地址】http://www.infoq.com/cn/articles/State-of-NoSQL经过了至少4年的激烈争论,现在是对NoSQL的现状做一个阶段性结论的时候了。围绕着NoSQL发生了如此之多的事情,以至于很难对其作出一个简单概括,也很难...
【转载】NoSQL架构实践(一)——以NoSQL为辅
【转载地址】http://www.infoq.com/cn/news/2011/02/nosql-architecture-practice前面《为什么要使用NoSQL》和《关系数据库还是NoSQL数据库》两篇从大体上介绍了为什么要用NoSQL,何时该用NoSQL。经常有朋友遇到困惑...
【转载】分布式缓存能否作为NoSQL数据库?
【转载地址】http://www.infoq.com/cn/news/2011/11/distributed-cache-nosql-data-sto?utm_source=infoq&utm_medium=related_content_link&utm_campaign=relatedContent_news_clk对于文档、对象图、键值对这样的非...
【转载】关系数据库还是NoSQL数据库
【转载地址】http://www.infoq.com/cn/news/2011/01/relation-db-nosql-db上一篇简单的说明了为什么要使用NoSQL。接下来我们看下如何把NoSQL引入到我们的项目中,我们到底要不要把NoSQL引入到项目中。在过去,我们只...
【转载】NoSQL开篇——为什么要使用NoSQL
【转载地址】http://www.infoq.com/cn/news/2011/01/nosql-why【编者按】NoSQL在2010年风生水起,大大小小的Web站点在追求高性能高可靠性方面,不由自主都选择了NoSQL技术作为优先考虑的方面。今年伊始,Inf...
STARTUP FORCE 理解
FORCEIf the database is open, then FORCE shuts down the database with a SHUTDOWN ABORT statement before re-opening it. If the database is closed, then FORCE opens th...
由中行IBM大型机宕机谈银行系统运维
12月15日中行IBM大型机宕机,系统没有第一时间切换到热备或者异地容灾上,直接影响中行的信用卡支付相关业务,直到4小时之后才恢复服务。由于银行业务的特殊性,对于系统的可用性要求极高,就此事件,我们采访了兴业...
理解FAST_START_MTTR_TARGET
Instance Recovery Performance Tuning: Fast-Start Fault RecoveryThis section describes instance recovery, and how Oracle's Fast-Start Fault Recovery improves availability in the event of a crash or ins...
ORACLE 10G 启动和停止 GRID CONTROL
2.6 Starting and Stopping Oracle Enterprise Manager 10g Grid ControlAs described in the previous sections, you use separate commands to control the Oracle Management Service, Oracle Manageme...
Important Notes on Oracle Enterprise Manager Grid Control
Important Notes on Oracle Enterprise Manager Grid ControlBasic questions and answers about Oracle Enterprise manager Grid Control.Terms to know about GRID: What is Grid Computing?In Gri...
Fails To Open / Create The Wallet: ORA-28353 [ID 395252.1]
Fails To Open / Create The Wallet: ORA-28353 [ID 395252.1]To BottomModified:19-Nov-2012Type:PROBLEMStatus:PUBLISHEDPriority:3Comments (0)In this DocumentSymptomsChangesCauseSolutionReferencesApplies t...
【侦听】V$session.server = none when using Shared Server/MTS Configuration
***This article is being delivered in Draft form. and may containerrors. Please use the MetaLink "Feedback" button to adviseOracle of any issues related to this article.***PURPOSE-------V$se...
学习金字塔
在塔尖,第一种学习方式——“听讲”,也就是老师在上面说,学生在下面听,这种我们最熟悉最常用的方式,学习效果却是最低的,两周以后学习的内容只能留下5%。第二种,通过“阅读”方式学到的内容,可以保留10%。第...
甲骨文推Exadata X3 新特性
10月1日,甲骨文公司首席执行官Larry Ellison在2012甲骨文全球大会上发表开幕主题演讲,并宣布推出Oracle Exadata X3 Database In-Memory Machine。该产品是Oracle Exadata数据库云服务器(Oracle Exadata Database ...
How To Configure The "/etc/hosts" File On Linux [ID 242490.1]
Applies to:Linux OS - Version Enterprise Linux 4.0 and laterLinux x86Linux x86-64***Checked for relevance on 17-Jun-2010*** ***Checked for relevance on 20-Feb-2013*** PurposeThis article wil...
How to Validate Network and Name Resolution Setup for the Clusterware and RAC
[ID 1054902.1]Oracle Database - Enterprise Edition - Version 10.1.0.2 to 11.2.0.3 [Release 10.1 to 11.2]Information in this document applies to any platform.PurposeCluster Verification Utility (ak...
【GC】How to Install Grid Control Agents on RAC Clusters? [ID 378037.1]
Applies to:Enterprise Manager Base Platform. - Version 10.2.0.1 to 11.1.0.1 [Release 10.2 to 11.1]Information in this document applies to any platform.Checked for relevance on Feb-18-2013GoalThis is a...
【转载】SCN 备份与恢复的关系
【转载地址:】http://space.itpub.net/196700/viewspace-703392下面的各种情况已经做过测试首先这里我们先介绍四个SCN概念。1、系统检查点scn当一个检查点动作完成后,Oracle就把系统检查点的SCN存储到控制文件...