Insert Items to DynamoDB Tables using Java
On a previousarticle we learned how to create DynamoDB Tables using Java.Next step is to insert items to the DynamoDB Tables previously created. Keep in mind that for the insert action the most basic...
View ArticleNew DataStax Enterprise Drivers Available Now
Today, we are thrilled to introduce a new set of DataStax Enterprise Drivers built on top of the widely used open source DataStax drivers for Apache Cassandra and enhanced to ease the development...
View ArticleMicrosoft Highlighted as Hortonworks’ Premier Cloud Solution
Today we announced Microsoft Azure HDInsight as our Premier Connected Data Platforms cloud solution, providing customers Apache Hadoop as a fully managed cloud service. The announcement is very timely...
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Go Newsletter Issue #116
Gophers, Please Tag Your Releases opinion Go projects ‘don’t have versions, at least not in the way that our friends in other languages use that word.’ Dave wants to improve the situation by...
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Percona Server for MongoDB 3.2.7-1.1 is now available
Percona announces the release of Percona Server for MongoDB 3.2.7-1.1 on June 29, 2016. Downloadthe latest version from thePercona web siteor the Percona Software Repositories . Percona Server for...
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MapR Spyglass Initiative Eases Big Data Management
Hadoop distributor MapR has introduced new management tools into its Converged Data Platform that make it easier for enterprises to get control over these infrastructure components. 12 Inspiring Women...
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Migrating from chained Freestyle jobs to Pipelines
This is a guest post byR. Tyler Croy, who is a long-time contributor to Jenkins and the primary contact for Jenkins project infrastructure. He is also a Jenkins Evangelist at CloudBees, Inc. For ages...
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YouGov powers its research with MongoDB
Given that market research is a business that is all about the data, and the ease at which you can work with the data you collect, it’s unsurprising that the choice of database place a central role...
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Creating a MongoDB replica set using Docker
Replication is a technique used my MongoDB to ensure that your data is always backed up for safe keeping, in case one of your database servers decide to crash, shut down or turn into Ultron. Even...
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New Neo4j 3.0 Online Training Classes for Cypher & Production Deployment
ByMichael Hunger, Developer Relations | June 30, 2016 Since the launch ofNeo4j 3.0 at GraphConnect Europe, we’ve been working on moving our online training classes to their new home on neo4j.com . By...
View Article3-2数据定义
3-2数据定义tags:数据库 关系数据库系统支持三级模式结构,其模式、外模式和内模式中单基本对象幽默师表,视图和索引等.因此SQL的数据定义功能包括,模式定义,表定义,视图和索引定义. 操作对象 创建 删除 修改 模式 create schema drop schema 表 create table drop table alter table 视图 create view drop view...
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OpenCPS: Vietnam's Public Sector goes Open Source
You are here Home Blogs colin's blog Thu, 2016-05-05 15:33 colin I'm now in Hanoi, Vietnam, for the launch of OpenCPS . What, might you ask, is OpenCPS? OpenCPS translates to Open Core Public Services,...
View ArticleRedis 非关系型数据库 ( Nosql )
简介： Redis 是一个开源的，高性能的 key-value 系统，可以用来缓存或存储数据。 Redis 数据可以持久化，并且支持多种数据类型:字符串（string）,列表（list）,哈希（hash）,集合（set）和有序集合（sorted set)。 能够对关系型数据库起到很好的补充作用。它还提供了多种客户端 python 、Ruby 、Erlang 、php ，可以方便调用。 持久化：...
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在选择数据库的路上，我们遇到过哪些坑？（2）
【编者按】你会怎么选择数据库，是关系数据库、XML 数据库、资源描述框架（RDF），还是图形数据库？ 本文的第1部分 深入而生动地探讨了各种选择。在第2部分，将深入介绍使用 Neo4j 的注意点。文章系国内ITOM 管理平台OneAPM 编译呈现。 过渡到 Neo4j 之后的经验和教训 下面介绍一些有关运行 Neo4j 的实用技巧： 1. 如果你是Java 商城，请嵌入式地运行 Neo4j...
View ArticlelevelDB 源码分析（二）：Slice
levelDB 中 Slice 是非常简单的数据结构，它包括 size (字符串的长度)和一个指向外部字节数组的指针。 使用 slice 之前必须要保证 slice 中指针指向的内存没有被收回。 class Slice { public: // 创建一个空的slice Slice() : data_(""), size_(0) { } // 根据d[0,n-1]创建一个Slice...
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Offline Syncing in Ionic 2 with PouchDB & CouchDB
Since I started travelling around Australia I’ve tried to keep things pretty minimal. I got rid of all the clothes I didn’t need, shoes, kitchen ware, furniture, cleaning products and so on....
View ArticlelevelDB 源码分析（三）：Status
Status 囊括了一个操作的结果。可以表示成功，也可以表示错误，对于出错的操作还会返回相应的出错信息。 通常的错误处理（如:errno）是返回一个错误号，然后根据错误号可以获得出错的描述信息。 leveldb将错误号和错误信息封装成 Status 类，来统一进行处理。 class Status { public: // 创建一个成功的status Status() : state_(NULL) {...
View ArticleLondon in May 2016
I’m happy to be back in London in May 2016, to talk at two events: The London mysql Meetup Group Monday May 9 6.30 PM 9.00 PM options for High Availability in the ecosystem that one would consider...
View ArticleTimesTen的守护进程
TimesTen的守护进程分为主守护进程和子守护进程。主守护进程主守护进程即ttDaemonAdmin启动的进程，也称为Data Manager Daemon。主守护进程的作用为：Manages shared memory access Coordinates process recovery Keeps management statistics on what databases exist,...
View Article使用SQL存储过程
SQLSERVER:变量的声明:声明变量时必须在变量前加@符号DECLARE @I INT变量的赋值:变量赋值时变量前必须加setSET @I = 30声明多个变量:DECLARE @s varchar(10),@a INTif语句:if .. begin ... end else if .. begin ... end else begin ... end Example:DECLARE @d...
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