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Working with big data databases in Delphi Cassandra, Couchbase and MongoDB (P...
This is the second part of a three-part series on working with big data databases directly from Delphi. In this second part we focus on a basic class framework for working with Couchbase along with...
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Report: Hadoop in the enterprise: how to start small and grow to success
Our library of 1700 research reportsisavailable only to our subscribers.We occasionallyrelease ones for our larger audience to benefit from. This is one such report. If you would like access to our...
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All big data clouds are not alike
As noted a few weeks back, the future of Big Data is cloudy . There's simply too great a disconnect between interest and latent demand for understanding from Big Data, and the skills necessary to...
View ArticleIan Barwick: repmgr 3.3
repmgr 3.3 introduces a number of additional options for setting up and managing replication clusters, with particular emphasis on cascading replication support. These changes will also make it easier...
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Ignorance is bliss, but not for MongoDB
The database management system MongoDB is currently being downloaded at an impressive rate: approximately 30 000 times per day. Widely spread, this open source software is today the talk of the town...
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openCypher the SQL of Graphs Hosts First Implementers Meeting (oCIM)
ByAlastair Green, Director of Product Management, Neo4j | February 1, 2017 I’ve only been on the Neo4j team for eight months, but it’s been a hectic and fascinating introduction to the world of graph...
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Graph Databases: The Right Technology for the Right Time
Graph 101: An Introduction to Graph Databases webinar on February 23rd! The core components of traditional databases, such as tables and columns, obfuscate the natural relationships between data...
View ArticleLettuce 4.3.1 发布，安全的 Redis 客户端
Lettuce 4.3.1 正式发布了，主要修复一些问题。Lettuce是一个可伸缩线程安全的Redis客户端。多个线程可以共享同一个RedisConnection。它利用优秀netty NIO框架来高效地管理多个连接。 修复： Apply proxy wrapper to obtained pooled connections #411 Allow databases greater than...
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JDBC设置事务的隔离级别和转账案例 JDBC 隔离级别 转账案例 JDBC事务
转帐案例 1)参见图<<转帐各类的交互图示>> 2)项目中，事务可能在dao层，也可能在service层，不论在哪一层，都必须确保使用的都是同一个connection 3)为了确保在Service和Dao层中用到的Connection一致，你可以使用如下方案解决： a)将Service中的Connection传入Dao中 设计缺点： Service和Dao代码过分藕合...
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用Navicat连接数据库详解 Navicat Navicat连接数据库 连接数据库 数据库详解
本文远程服务器使用ubuntu，数据库使用mysql 一般我们在本地连接远程数据库可以使用Navicat进行连接因为Navicat自带SSH我们可以通过SSH进行连接此方法步骤简单 方法一：用Navicat自带的SSH进行连接 1.首先我们在Navicat中新建连接 在用户名中填写远程数据库的登录用户名，密码框中填写MySQL登录密码 2.我们进入SSH连接配置...
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An IVR with Neo4j and F# -- Part 2 A
Why am I doing this? Inpart 1 I talked about getting started on my graph-based IVR system. I started with modeling the authentication sub-graph. I wrote some Cypher queries to build the graph in Neo4j....
View ArticleNew class: Immersion Event on PowerShell for SQL Server DBAs
We have a really cool new class debuting this May in Chicago: Immersion Event on PowerShell for SQL Server DBAs . It’s a 3-day class, taught by MVP, MCM, and industry expert Ben Miller, and no prior...
View ArticleBuilding a Performant API using Go and Cassandra
Introduction Software performance is critical to a SaaS company likeStream and while the majority of our infrastructure is written in python, we are actively porting portions of our code base to Go....
View ArticleThe Data Day: January 27, 2017
Alternative data platforms and analytics facts. For @451Research clients: Big data's rising cloud, Part 1: Hadoop on infrastructure as a service https://t.co/8GHaj9Zzg8 By @jmscrts ― Matt Aslett...
View ArticleUbuntu下安装mongodb 3.4的详细过程
概述这个教程讲述了在长期支持版 Ubuntu linux 系统上从 .deb 包安装 Mongodb 社区版的步骤。虽然 Ubuntu 软件仓库中已经包含了 MongoDB 的包，但并不是最新的版本。平台支持：MongoDB 提供的包只支持 64 位长期支持版本的 Ubuntu 发行版。比如 Ubuntu 12.04 LTS (precise), 14.04 LTS (trusty), 16.04...
View ArticleMongodb如何开启用户访问控制详解
前言Mongodb 数据库默认情况下是没有访问控制的，整个数据库对外是开发的，只要能连上数据库，则可以进行任何操作，这会对数据带来很大的风险。当然，我们可以启用mongodb的访问控制，只让通过认证的用户才能对数据库进行角色范围内的操作。启用访问控制可以通过在启动 mongodb 时指定 --auth 参数来设置，另外还涉及到创建用户 db.createUser...
View Article新的一年又要开工了
新的一年又要开工了，对过去的一年做下总结，对新的一年也有新的期待。 2016年的工作总结 上半年主要 1.公司ETL开发规范化并实现调度实时监控,实现数据整合及完成源清洗及数据集市层逻辑校验 2.通过与IBM技术顾问学习实现DataStage技能的提升 下半年主要 4:角色的转变：由ETL和建模组长变成项目负责人 5:项目也由传统数仓转变基于Hadoop平台的数仓 2017年的规划 1....
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Apache Ambari一Knowing the Basics
Apache Ambari provides an end-to-end management and monitoring application for Apache Hadoop . With Ambari, you can deploy and operate a complete Hadoop stack using a graphical user interface (GUI),...
View ArticleHadoop Weekly Issue #202
29 January 2017 This week's issue has a pretty even mix of tutorials and technical deep dives. In news, there are two calls for participation, and in releases, Apache Hadoop has a new alpha release...
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HBase Adds MultiWAL Support
HBase Adds MultiWAL Support Written by Kay Ewbank Thursday, 02 February 2017 A new version of Apache HBase is available with date-based tiered compactions and a CoDel based RPC scheduler. Apache HBase...
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