With Hadoop or Hadoop?

Hadoop is often identified as the only solution that can help you solve all problems. When people refer to "Big data" or "data analysis" and other related issues, they will hear an blurted answer: hadoop! Hadoop is actually designed and built to solve a range of specific problems. Hadoop is at best a bad choice for some problems. For other issues, choosing Hadoop could even be a mistake. For data conversion operations, or a broader sense of decimation-conversion-loading operations, E ...

Cassandra Kill back database Top 10, and Demand Java 7 version 2.0

After MySQL was acquired by Oracle, the industry has never stopped talking about the Open-source database, and the voice of PostgreSQL will be replaced as the most popular Open-source database. However, from the Db-engines rankings, the gap between PostgreSQL and MySQL is far more than "a few floors" so high (PostgreSQL not score a fraction of MySQL). Looking at the entire list of 193 databases, we will find that the NoSQL database has accounted for most of the traditional relationship ...

Common errors and solutions for Hadoop deployment on Redhat Linux 5

Problems encountered: 1, under the Hadoop conf execute command: hadoop-daemon.sh start Datanode, unable to start Hadoop datanode: [Hadoop@master conf]$ hadoop-daemon.sh   Start Datanode Warning: $HADOOP _home is deprecated. Starting Datano ...

Oracle Database Performance Optimization

In fact, in order to ensure the Oracle database running in the best performance state, the database optimization strategy should be considered before the http://www.aliyun.com/zixun/aggregation/32730.html "> Information system development." Optimization strategy generally includes server operating system parameter adjustment, Oracle database parameter adjustment, network performance adjustment, application SQL statement analysis and design, in which the application analysis and design is before the information system development ...

See how open Source technology can work in the cloud of the battlefield

According to army and contractor executives working in Afghanistan's distributed general ground system-Army standard Cloud (DSC), cloud computing has no doubt changed military intelligence forever. "From a technical standpoint, in response to http://www.aliyun.com/zixun/aggregation/14345.html," said Shane Miller, head of DCGS's main contractor, Booz Allen Hamilton. > Data Management and ...

Nvidia finally focused on open source drives

Open source drives are something that Linux developers and users care about very much, but unfortunately, many companies don't care about it, such as Nvidia has always been open source http://www.aliyun.com/zixun/aggregation/36046.html ">   Graphics driver not cold, the Linux community is very dissatisfied with it, Linus Torvalds even once in public abuse "fxxk You". Nvidia has always preferred its own closed-source drive, province ...

Raw, 5 minutes. Open Source Data visualization tool

"When you have a hammer, everything looks like nails," many people use this phrase to describe http://www.aliyun.com/zixun/aggregation/12238.html "> Data visualization Fanatics." But is there really such a data visualization "Hammer"?   Open source data visualization tool Raw gives the answer. With raw you can easily finish some advanced data visualization in a few minutes (of course, you'd better read the flow ...).

Implementing a virtual Data Environment: WAN optimization is the key

http://www.aliyun.com/zixun/aggregation/13868.html "> Software definition Network may bring the most fundamental change to the enterprise to date.   In the near future, companies will be able to run the entire data environment on a fully virtualized infrastructure that is likely to be distributed in remote locations. This also allows us to make some assumptions about the data network.   For example, in a broader sense, subdivide the edge of the datacenter as well as the WAN and local area networks. In most ...

Java Open source CMS system-JEECMS v5 release

JEECMSV5 is a support column model, the content model cross custom CMS, for those who do not understand the technology, as long as through the background of simple settings can customize the set of news management, Image Library management, video management, download system, library Management, government open, work management, http:// Www.aliyun.com/zixun/aggregation/8778.html "> Product release, Supply and demand information, housing rental and sales, recruitment information, network questionnaires and message board in one integrated and not ...

Hadoop Application Case Study: Facebook apps

Facebook, the world's leading social networking site, has more than 300 million active users, with about 30 million users updating their status at least once a month, with users uploading more than 1 billion photos and 10 million videos a week, and sharing 1 billion weekly content, including logs, links, news, tweets, etc. So the amount of data that Facebook needs to store and process is huge, adding 4TB of compressed data every day, scanning 135TB size data, performing hive tasks on the cluster more than 7,500 times per hour, and 80,000 times a week.

Thinksaas Open Source Community 2.0 release Download

Download Address: Http://file.thinksaas.cn/down/thinksaas2.0.zip ThinkSAAS2.0 update content: Version 2.0 http://www.aliyun.com/zixun/ aggregation/18537.html > New features. Increase the background user message management. Increase background message management. Increase the management of Amoy paste, improve the function of the post album ...

New virtualization options for open source project docker,red hat

Red hat works with the open source project Docker container http://www.aliyun.com/zixun/aggregation/7332.html "> Technology Developer Team to provide a virtual Machine Manager technology (hypervisors   ) alternatives. Linux publisher Red Hat is working with virtual technology company DotCloud to develop a new open source container technology for the Fedora Community Linux project called Doc ...

Openkit Push mobile games open source Platform

Beijing Time September 28 news, according to foreign media reports, Openkit has officially launched its mobile social games open source platform, the platform for all developers to use. Openkit, the co-founder of Peter Ruiland, announced the creation of the OpenFeint service last December, which was bought by Gree and closed last year. This March, Openkit released version 1.0 closed beta. Openkit claims that it is supporting GAM ...

Prospect of enterprise-class NoSQL

NoSQL database is currently managing http://www.aliyun.com/zixun/aggregation/13584.html "> Mass data in Web applications and other systems.   In the future, the NoSQL system will adapt to real-time analysis, and become a part of enterprise-class NoSQL Data system integration work. Recently, executives from Oracle, MarkLogic and FOUNDATIONDB, as well as nosql-field companies, held nosq in San Jose, California ...

Wang Zhenping: Architecture and challenges based on Hadoop log trading platform

Shanghai Bao Xin Senior engineer Wang Zhenping from the financial industry, from the background, needs and objectives, problems, system architecture and other Hadoop knowledge of 5 aspects of the log trading platform based on Hadoop to share in-depth: Background use scenarios: credit card consumption delay, transaction failure and failure of the reasons and types,   Do not standardize the trading agencies and merchants to find and produce reasons.   Data characteristics: In the amount of data, nearly 300 million transactions per day, in the data state, currently only store the fitted transactions, the original transaction log is not available. Needs and goals ...

10 Worthwhile enterprise/individual open source application

Once upon a time, Open-source software was completely insignificant. Today, open source is a great way to go, many software is already very beautiful scenery. However, there are some software obscurity is the baby. It's not clear how many people know and use the software and apps.   Believe that if more people understand these open source applications, they are likely to replace some of the mainstream products. You may never have heard of the software, or you may have heard it, but you haven't been able to use it, because you're already using another "decent" piece of software. Linux expert Jack Wallen in this article ...

Long: Hadoop principle, Application scenario and core idea

Long, founder of the Easyhadop community, the original Storm audio platform research and development manager, the first in the country to obtain the United States Cloudera company Apache Development Engineer (CCDH) certification examination); Red Elephant Cloud Teng founder & chief architect, many times in the China CIO Annual meeting, Aliyun Congress, the Beijing University CIO Forum published a large data speech, but also data Wis large numbers Hadoop experts. In this big Data salon, ...

will open source hypervisor be popular in enterprises?

As more companies move to different types of hypervisor or just for cost-cutting reasons, the scope of the open source hypervisor is still small, although the gap has narrowed. Of course, trust is an important aspect, but is there any other factor that hinders open source hypervisor into the data center? We consulted the members of the TechTarget Committee of Experts on Open source hypervisor have the opportunity to catch up with VMware and http://www.aliyun.com/zixun/...

Nvidia will provide technical documentation to open source Drive project Nouveau

Reverse engineering nvidia closed source driven Open-source Drive Project Nouveau has long been not officially supported by Nvidia official support and attention. Now, an NVIDIA driver appears in Nouveau's mailing list, announcing that Nvidia will provide technical documentation to nouveau, the first batch of documents to be associated with device-driven blocks, and this Nvidia employee is a private Linux GPU-driven developer,   He offered to help the Nouveau project in its power. An event last June ...

Using Hadoop platform to develop ad accurate delivery system

The China Internet Development Report (2013), published recently by the National Internet Association, points out that China Mobile's marketing market is exploding, with an overall market size of 6.35 billion yuan in 2012 and an increase of 162.4% over the previous year. The number of smartphone users in China has reached 380 million by the end of 2012, the agency's consultancy also said in a study. Nielsen, the US market research firm, said in a report that China's smartphone penetration rate has reached 66% per cent, surpassing the UK and US markets. The constant popularity of smartphones, for the advertising industry, means ...

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