MapReduce connection: Heavy partition connection

MapReduce connection operations can be used in the following scenarios: aggregation of demographic information for the user (for example, differences in habits between teens and middle-aged people). When users do not use the site for a certain amount of time, email them to remind them. (This threshold for a certain time is the user's own predefined) analysis of user browsing habits. The system can be based on this analysis to prompt the user what web site features have not yet been used.   And then form a feedback loop.   All of these scenarios require that you connect multiple datasets. The two most commonly used connection types ...

Using Windows Azure to build a Hadoop cluster

The project uses CDH (Cloudera distribution including Apache Hadoop) in the private cloud to build a Hadoop cluster for large data calculations. As a loyal fan of Microsoft, deploying CDH to Windows Azure virtual machines is my choice. Because there are multiple open Source services in CDH, virtual machines need to be open to many ports. The network of virtual machines in Windows Azure is securely isolated, so the Windows Azu ...

Common small script for Hadoop deployment

Recently abandoned the non-SSH connection http://www.aliyun.com/zixun/aggregation/14119.html ">hadoop cluster deployment, or back to the way the SSH key authentication." There is some trouble here, each machine must upload the public key.   I am also a very lazy person, so write a few small script completed, as long as the top of a machine can do the distribution of the public key. The first is to generate an SSH key script: SSH-...

Hadoop1.2.1 pseudo Distribution Mode installation tutorial

First, the hardware environment Hadoop build system environment: A Linux ubuntu-13.04-desktop-i386 system, both do namenode, and do datanode. (Ubuntu system built on the hardware virtual machine) Hadoop installation target version: Hadoop1.2.1 JDK installation version: jdk-7u40-linux-i586 Pig installation version: pig-0.11.1 Hardware virtual machine Erection Environment: IBM Tower ...

Hadoop selection: A few major factors to consider

"Enterprise Network D1net" March 18, the development of Apache Hadoop has been going through a long time, but also experienced a journey from birth to maturity, in the initial stage of Apache Hadoop, mainly supporting the function of similar search engines. Today, Hadoop has been adopted by dozens of industries that rely on large data calculations to improve business processing performance. Governments, manufacturing, healthcare, retailing and other sectors are increasingly benefiting from economic development and Hadoop computing capabilities, but are limited by traditional enterprise solutions ...

Newsql debut, NuoDB tell you what the future database looks like

When a big client wants to continue to invest more in your company, that's a good sign, and that's what the database start-up NuoDB is going through today, announcing the 14.2 million-dollar financing. Dassault Systèmes, Europe's second-largest software company (after SAP), has a strong interest in NuoDB and has been an investor. Dassault is a supplier of development tools for the 3D printing industry. Rather than letting customers run their software in their own data center, Dassault would prefer to ...

Application of HBase in Content recommendation engine system

After Facebook abandoned Cassandra, HBase 0.89 was given a lot of stability optimizations to make it truly an industrial-grade, structured data storage retrieval system. Facebook's Puma, Titan, ODS time Series monitoring system uses hbase as a back-end data storage System.   HBase is also used in some projects of domestic companies. HBase subordinate to the Hadoop ecosystem, from the beginning of the design of the system is very focused on the expansion of the dynamic expansion of the cluster, load are ...

10 insights into the new Era application design and MongoDB

Serendip is a social music service, used as a http://www.aliyun.com/zixun/aggregation/10585.html "> Music sharing" between friends. Based on the "people to clustering" this reason, users have a great chance to find their favorite music friends. Serendip is built on AWS, using a stack that includes Scala (and some Java), Akka (for concurrency), play framework (for Web and API front-end ...).

Constructing Internet Data Warehouse and business intelligence system with Sql-on-hadoop

Big data is now a very hot topic, SQL on Hadoop is the current large data technology development in an important direction, how to quickly understand the mastery of this technology, CSDN specially invited Liang to do this lecture for us. Using Sql-on-hadoop to build Internet Data Warehouse and business intelligence system, through analyzing the current situation of business demand and sql-on-hadoop, this paper expounds the technical points of SQL on Hadoop in detail, shares the experience of the first line, and helps the technicians to master the relevant technology quickly ...

How to configure the appropriate hardware for the Hadoop cluster

The concept of Hadoop has become less unfamiliar with the advent of the big data age, and in practical applications, how to choose the right hardware for the Hadoop cluster is a key issue for many people to start using Hadoop. In the past, large data processing was mainly based on a standardized blade server and storage Area Network (SAN) to meet grid and processing-intensive workloads. However, as the amount of data and the number of users increased dramatically, infrastructure requirements have changed, hardware manufacturers must establish innovative systems to meet large data pairs including storage blades, SA ...

The latest development of ONS 2014:opendaylight Open Source SDN Project

Opendaylight Open Source http://www.aliyun.com/zixun/aggregation/13868.html "> Software definition Network [note] (sdn[note]) project was founded under the sponsorship of the Linux Foundation, The project launched its first open source version of ――hydrogen in less than a year, and after one months of its launch, Opendaylight has been rolling out a later version of ――heli ...

High Salary: 6 tips for Hadoop job seeker

The big data industry is growing better, enterprises do not hesitate to hire data analysts, "learning Hadoop, looking for a good job is not a dream," the slogan inspired countless students to devote to large data cause, but the employment is not so simple, "work experience" undoubtedly to the students seeking high-paying jobs broke the basin of cold water, how to solve the experience problem? How to make yourself look more professional? How do you get a deeper insight into your industry? Technical recruiters offer insights and suggestions for job seekers with Hadoop skills. InformationWeek writer Kevin Cas ...

The father of Hadoop Doug Cutting

In life, perhaps all of them have indirectly used his work, and he is the initiator of Lucene, Nutch, Hadoop and other projects. It was he who made the esoteric search technology a product that contributed to the general public, or he created Hadoop, which is now at the zenith of cloud computing and large data.   He is a kind of thief of fire, he is Doug Cutting. From the intern 1985, cutting graduated from Stanford University in the United States. He was not at the outset determined to join the IT industry, in the college era ...

Compare MySQL, when exactly do you need MongoDB

NoSQL has been in vogue for a long time, so what exactly is the scene you need to use these "emerging things", such as http://www.aliyun.com/zixun/aggregation/13461.html ">mongodb?" Here are some summaries: you expect a higher write load by default, compare transaction security, MongoDB more attention to high insertion speed. If you need to load a lot of low-value business data, then MONGO ...

Cloudera brings machine learning open source tools for Hadoop Oryx

Cloudera, a Hadoop publisher, did not cause much concern when it bought a london-based start-up company last year Myrrix, and Cloudera rarely promoted the company's technology in machine learning.   But Myrrix's technology and his founder Sean Owen's value and influence in machine learning are not to be underestimated.   Owen is currently developing an open source machine learning Project--oryx (Oryx, Cloudera also sells a product called Impala, Impala). Oryx's goal is to help ...

Using Hadoop streaming to process binary format files

Hadoop streaming is a multi-language programming tool provided by Hadoop that allows users to write mapper and reducer processing text data using their own programming languages such as Python, PHP, or C #. Hadoop streaming has some configuration parameters that can be used to support the processing of multiple-field text data and participate in the introduction and programming of Hadoop streaming, which can be referenced in my article: "Hadoop streaming programming instance". However, with the H ...

Spark replaces MapReduce as the Apache top project

The Apache Spark is a memory data processing framework that has now been upgraded to a Apche top-level project, which helps to improve spark stability and replace mapreduce status in the next generation of large data applications. Spark has recently been very strong, replacing the mapreduce trend.   This Tuesday, the Apache Software Foundation announced Spark upgraded to a top-level project. Because of its performance and speed due to mapreduce and easier to use, spark currently has a large user and ...

MySQL or NoSQL: How to choose the database in the open source era

Open source data is divided into two factions, NoSQL enthusiasts like to publish a lengthy criticism of relational database limitations, MySQL enthusiasts stubbornly defend the health relational database-insist that the data neatly stored in the table.   You'd think the two sides would never get along, but in fact, tens of thousands of companies have been trying to combine relational and relational databases, and have tried it many years ago. But the development of new technologies is often antithetical to the technology of the past. When NoSQL developed, the name of the light sounded like ...

HBase Write Data process

Blog Description: 1, research version hbase 0.94.12;2, posted source code may be cut, only to retain the key code.   Discusses the HBase write data process from the client and server two aspects. One, client-side 1, write data API write data is mainly htable and batch write two API, the source code is as follows://write the API public void to put ("final") throws IO ...

10 large cross-platform tools that developers must understand

In the previous week, Qualcomm announced that it would expand the 骁丽 600 series processor, adding Gaotong 610 and 615 chipsets for high-end mobile computing terminals. 骁丽 615 is the mobile industry's first integrated LTE and 64-bit features of the commercial eight nuclear solution, claiming to be the fastest mobile chip on the market, its powerful performance is staggering ... Besides, what are some of the hot news on mobile channels?   Let's go through the mobile weekly to review it! 1. Mobile developers must be aware of the 10 of the great Cross-platform tools across platform development can be boundless ...

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