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HADOOP生态圈知识概述
一 . hadoop 生态概况 Hadoop 是一个由 Apache 基金会所开发的分布式系统基础架构。用户可以在不了解分布式底层细节的情况下，开发分布式程序。充分利用集群的威力进行高速运算和存储。具有可靠、高效、可伸缩的特点。 Hadoop 的核心是 YARN,HDFS 和 Mapreduce 下图是 hadoop 生态系统，集成 spark 生态圈。在未来一段时间内， hadoop 将于...
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NoSql入门和概述
NoSql入门和概述 入门概述 1 互联网时代背景下大机遇，为什么用nosql 1. 单机mysql的美好年代在90年代，一个网站的访问量一般都不大，用单个数据库完全可以轻松应付。 在那个时候，更多的都是静态网页，动态交互类型的网站不多。 上述架构下，我们来看看数据存储的瓶颈是什么？ 1.数据量的总大小 一个机器放不下时 2.数据的索引（B+ Tree）一个机器的内存放不下时...
View ArticleMongoDB的Spring配置使用
Spring-data对MongoDB进行了很好的支持，接下来就讲解一下关于Spring对MongoDB的配置和一些正常的使用 我下面的工程使用的是Spring的Java配置的方式和Maven构建 具体的工程代码大家可以访问我的Github地址: https://github.com/zoeminghong/springmvc-javaconfig ①MongoDB的必要配置 package...
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Azure Services You Need To Know
Azure SQL Database Historically, most of us developers have turned to the RDBMS to store data ... be that MS SQL Server, PostGres, or mysql, etc. But apart from using the database, we have also had to...
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The All-New, Officially Supported Neo4j-JDBC Driver 3.0
ByMichael Hunger, Developer Relations | July 5, 2016 The release of the new Neo4j-JDBC driver 3.0 solves many of your Neo4j data integration questions. Today we are happy to announce the availability...
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Sign up for our webinar on monitoring MongoDB (if you’re really a MySQL DBA)
In this new webinar on July 12th, we’ll discuss the most important metrics MongoDB offers and will describe them in ordinary plain mysql DBA language. We’ll have a look at the open source tools...
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Django和数据库打交道：数据建模
前面我们讲述了用 Django建造网站的基本途径：建立视图和 URLConf。正如我们所阐述的，视图负责处理一些任意逻辑，然后返回响应结果。在范例中，我们的任意逻辑就是计算当前的日期和时间。 在当代 Web应用中，任意逻辑经常牵涉到与数据库的交互。数据库驱动网站在后台连接数据库服务器，从中取出一些数据，然后在 Web页面用漂亮的格式展示这些数据。或者，站点也提供让访问者自行填充数据库的功能。...
View ArticleEY shares Key Observations from Hadoop Summit 2016
A guest blog post fromScott Schlesinger, Principal,America’s EY Advisory EY and Hortonworks formed a strategic business alliance in August 2015 that is focused on helping our valued clients turn big...
View ArticleQuerying Panama Papers Neo4j Database Container From a Linked Jupyter...
A few weeks ago I posted some quick doodles showing, on the one hand, how to get the Panama Papers data into a simple SQLite database and in another how to link a neo4j graph database to a Jupyter...
View ArticleSpark-on-HBase: DataFrame based HBase connector
We are proud to announce the technical preview of Spark-HBase Connector , developed by Hortonworks working with Bloomberg. The Spark-HBase connector leverages Data Source API ( SPARK-3247 ) introduced...
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Redis学习笔记（三）-数据类型之string类型
string是redis最基本的类型，而且 string类型是二进制安全的 。意思是redis的string 可以包含任何数据 。比如jpg图片或者序列化的对象。从内部实现来看其实 string可以看作byte数组，最大上限是1G字节 。下面是string类型的定义。 struct sdshdr { long len; long free; char buf[]; };...
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Carpenters vs. DBAs
Let’s get the caveat out of the way up front, I work for a tool vendor. If you look around at the tools landscape for the Microsoft Data Platform, it’s really interesting. There are a few tools...
View ArticleBuilding a React Native offline-first application using PouchDB and CouchDB
Introduction At YLD we have been doing some work with offline-first applications and, with the release of Service Workers, a major step has been taken in building these kind of applications in the...
View ArticleDockerize your MEAN application
Last week I wanted to make my MEAN application (MEAN standing for MongoDB /ExpressJS /AngularJS /NodeJS) able to run on Docker containers. As I use a very common Yeoman generator as a bootstrap for my...
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ClusterControl 1.3 Released with New Features for MySQL, Percona Server,...
The Severalnines team is pleased to announce the release of ClusterControl 1.3. This release contains key new features, such as Key Management for mysql, MariaDB, Percona Server and PostgreSQL,...
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Couchbase Weekly, June 7 2016
Learn what's latest in theCouchbase Community. Let us know if we missed anything at @couchbasedev , @couchbase or #Couchbase . Highlights Events Conferences: June 6 - 8: Spark Summit , San Francisco...
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基础设施服务化需要做哪些事情
基础设施服务化 所谓基础设施服务化就是希望做到这个 当用户需要获取某个基础设施的时候，比如一个redis的集群，或者mysql的集群，可以无需在钉钉上找管理员，无需用邮件提申请。在web界面上自助就可以搞定。 为什么这个问题会特别？相比较一下这两个场景：...
View ArticlePresent at GraphConnect SF: The Call for Papers Is Open!
ByRyan Boyd, Developer Relations Neo4j | July 6, 2016 We have just opened the Call for Papers for GraphConnect! Taking place October 13-14, the GraphConnect San Francisco conference is a gathering of...
View ArticleCouchDB Weekly News, April 14, 2016
Results of the 2016 Apache CouchDB Survey The responses from the 2016 survey on CouchDB have been collected and sorted and you can review the executive summary of responses , as well as the raw...
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Hadoop Summit Becomes Dataworks Summit #HS16SJ
At the end of the last keynote at Hadoop Summit 2016, Herb Cunitz (President of Hortonworks) announced that as part of the continuing effort to make a bigger tent, next year’s conference will be called...
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