NDP Episode #6: RavenDB, a NoSQL Database for .NET
I am pleased to announce that the sixth episode of the NoSQL Database Podcast has been published to the popular podcasting outlets. In this episode titled RavenDB, a NoSQL Database for .NET , I'm...
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Enterprise hits and misses diginomica ponders Brexit while Benioff airs it ou...
diginomica hit: Brexit redux diginomica ponders and Benioff airs it out, by Stuart, Den, and Martin quotage: “ It seems to me that the mood among citizens across Europe is ripe for the kind of social...
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MariaDB数据库基于SSL实现远程访问和主从复制
MariaDB数据库基于SSL实现远程访问和主从复制 实验环境 系统环境：Centos6.5 数据库版本：5.5.36-MariaDB-log MariaDB Server 虚机数量：2 方案实施： 1，配置CA；并为node1和node2生成key和证书 2，在node1和node2上安装Mariadb 3，配置节点1为MariaDB主节点 4，配置节点2为MariaDB从节点...
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How we built an Electric Racing Demo showcasing the Potential of Riak TS
Here at Basho we recently open source Riak TS, a new time series database built on the same foundation as Riak KV. Riak TS was selected by Intellicor e to be the storage engine behind their sports...
View Articlemongodb入门学习小记
Mongodb 简单入门（个人学习小记） 1、安装并注册成服务：(示例) E:\DevTools\mongodb3.2.6\bin>mongod.exe --bind_ip 127.0.0.1 --logpath "E:\mongod bDataBase\accountValueBase\log\log.txt" --dbpath "E:\mongodbDataBase\accountVal...
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Watson, WebEx Mashup, Hadoop Summit: Big Data Roundup
IBM Watson gets close with Cisco WebEx to improve collaboration. Hortonworks rolls out updates and initiatives at Hadoop Summit. MapR offers an update to please admins. MongoDB Atlas goes live with a...
View ArticleSQL之经典SQL语句大全
一、基础1、说明：创建数据库CREATE DATABASE database-name2、说明：删除数据库drop database dbname3、说明：备份sql server---创建 备份数据的deviceUSE masterEXEC sp_addumpdevice 'disk', 'testBack', 'c:\mssql7backup\MyNwind_1.dat'---开始...
View ArticleTimesTen数据库复制学习：19.解决复制冲突
本文针对的是classic复制的双向复制模式复制冲突是如何产生的有update冲突，insert冲突，delete/update冲突，在本节中都有示例说明。基本都是由于两个master同时操作同一条记录所致，导致从两方发出的操作交织在一起，导致不一致，如果是串行的倒也无所谓了。还需强调一点，这些冲突可以检测到，但并不会自动解决，需要应用来处理 Within a single database,...
View Article数据库死锁
最近做项目时，将原先单条插入更新数据库时改为批量插入更新。这样做的好处是降低了QPS(sql语句的数量)，但是同时也带来一个问题，DB的行锁急剧增加。 由于批量更新执行时间长，导致资源被长时间锁定，从而导致了大量的死锁产生，即出现以下错误信息： Deadlock found when trying to get lock; try restarting transaction...
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锁与并发-SQLServer
并发可以定义为多个进程同时访问或修改共享数据的能力。处于活动状态而互不干涉的并发用户进程的数量越多，数据库系统的并发性就越好。当一个正在修改数据的进程阻止了其他进程读取该数据，或者当一个正在读取数据的进程阻止了其他进程修改该数据，并发性就降低了。本文用术语“读取”或者“访问”描述数据上的SELECT操作，用“写入”或“修改”描述数据上的INSERT,UPDATE以及DELETE操作。...
View Articleibatis.net 实现多数据库配置
使用ibatis.net ORM框架时，有时候需要操作多个数据库，同时有时候也需要对连接数据库信息进行加密，本文通过将配置连接写到Web.config中，这样就可以在Web.config中加密，在读取的地方再解密使用。 下面是具体的配置方法，有更好方法的也欢迎指出， 对于ibatis.net 使用基础知识，请参照其他资料1.2...
View ArticleThe Easiest Way to Learn Neo4j: Video Tutorials [Community Post]
ByCode Complete, Code Complete | June 14, 2016 [As community content, this post reflects the views and opinions of the particular author and does not necessarily reflect the official stance of Neo4j.]...
View Article异步队列 sidekiq 指南
Sidekiq 是为 Ruby 打造的一个全功能后台处理框架，可以很方便地集成到大部分 Rails 程序中。网上关于 Sidekiq 的中文资料还是比较少，这里我结合官方文档给大家做简要介绍。版本：4.1.4 快速入门 开发者已经尽量考虑到集成的问题，所以只需要简单几步即可完成 sidekiq 的使用。 首先，在 Gemfile 中添加对应包 gem 'sidekiq' 。 接着，在...
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Pocket Watch: Verifying Exabytes of Data
There is nothing more important to Dropbox than the safety of our user data. When we set out to build Magic Pocket, our in-house multi-exabyte storage system , durability was the requirement that...
View ArticleMongodb 授权 用户管理 添加用户
【开发过程的随笔总结，欢迎您的点评，可以做到更加严谨 】 简介：mongoDB noSql数据库 文档型数据库 前些天，做一个日志归类入库项目的时候 用mongoDB进行持久化存储 防止mongoDb的无权限链接，添加了权限验证 1 如果mongoDB是开放内网地址的话，不用担心外部链接 2 mongoDB添加用户（版本mongoDB 3.2.7） 授权方式启动服务 要让用户生效 ,...
View ArticleUsing Honcho to Create a Multi-Process Docker Container
A common misconception is that Docker is only for creating single-process or single-service containers. While it’s true that the Dockerfile and docker run command options are designed for running a...
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Build your own offshore company
(This article was first published on Opiate for the masses , and kindly contributed toR-bloggers) Hackathons are not alike R ecently, a number of this blog’s authors were at a data hackathon , the...
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Comment on Significant performance boost with new MariaDB page compression on...
The MariaDB project is pleased to announce a special preview release of MariaDB 10.0.9 with significant performance gains on FusionIO devices. This is is a beta-quality preview release. Download...
View ArticleHawkular Metrics 0.17.0 发布
Hawkular Metrics 0.17.0 发布了，该版本更新主要包括性能增强和全新的Grafana Datasource插件，具体如下： 更新日志： 1. Grafana Datasource Plugin - Experimental A new Grafana 3 datasource plugin is now available for Hawkular Metrics. This...
View ArticleOver 6,000 Redis Database Servers Ready for the Taking
The total disregard for any security features in the creation of the Redis database server has come around to haunt the project years after, as Risk Based Security (RBS) is reporting on discovering...
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