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have been in touch with Hadoop for two years, during which there are many problems, both classic Namenode and jobtracker memory overflow failures, HDFs storage small file problems, both task scheduling problems and MapReduce performance problems. Some of these problems are the pitfalls of Hadoop itself (short boards), and others are improperly used. In the process of solving problems, sometimes need to turn over the source code, sometimes to colleagues, netizens consult, encounter complex problems will be through the mail list to the world of Hadoop users, ...

When Kelly Halfin decided to take a job in the U.S., High-tech companies in the United States looked to the hot free players as a favourite. In Belgium, five American companies lined up to sign her, hoping she would lead the company's data analysis team. She chose Livestream, the company's head of business intelligence, and used data analysis techniques to help make product decisions based on New York's live video (live-events) website. "It may be surprising for a company to enter a new field, but (now) ...

Whether companies like it or not, the "BYOD" trend has become a climate. According to the Juniper study, the number of employees who use their own smartphones and tablets in their jobs will grow by as much as 350 million in 2014, up from 150 million this year. But if your business is the same as most companies, it may not yet have a formal strategy for defending against BYOD risks. A new survey, conducted jointly by the Security awareness Training company KNOWBE4 and the consulting firm Itic, found that 71% of businesses allowed to use B ...

Now that the change in it is becoming more and more rapid, if the Internet from the beginning to the prevalence of ten years, then the rapid development of mobility only in less than five years of vision. It can be said that there are two major technology trends are changing the entire IT industry, one is mobile internet, the other is large data. Obviously there is a certain connection between the two. The mobility makes the application scene richer, lets the user walk from the office to the outdoors, becomes the enterprise obtains the data the important source. Faced with the surge in data volume, how to better play the effectiveness of it practitioners, especially the enterprise CIOs face the spine ...

Beijing Time September 27 News, Cisco announced today, has acquired Thinksmart Technologies, the company mainly provides Wi-Fi positioning data analysis technology. Cisco did not disclose the exact amount of the deal. Thinksmart Technology strengthens the wireless network infrastructure and provides positioning analysis for service providers and business customers. Its location analysis is aimed at the action information of the place, including time, flow mode, residence time and so on. Cisco believes that this information allows companies, site operators to determine the appropriate staffing, reduce ...

Beijing Time September 9 News, according to foreign media reports, in recent years, the technical storm began to scrape into the consumer market, influence once stronger than once. By remembering the personal computers of the 80 's, the Internet of the 90, and the development of smartphones in the last 5 years, you can feel how the power of technology affects our lives deeply. Another technology development trend is that computing power is becoming more and more powerful. Many researchers and entrepreneurs believe that more intelligent devices and software will be able to accomplish more tasks based on automation, helping to make more rational business, scientific and government decisions ...

Beijing August 23 News, according to foreign media reports, supermarkets inside how to design to maximize the increase in sales? On the face of it, the problem seems to be not related to data scientists. Consumer behavior is hard to quantify: unpredictable and seemingly unfounded. Why do some shoppers spend more time in certain channels than others? Why does every shopper have a different route to walk in the store? Why do some products sell well in the morning, but not at all in the afternoon? The answer to these questions depends on unstructured data analysis--because of unstructured data that cannot be uniform ...

Beijing Time August 18 news, according to foreign media reports, when it comes to information storage, hard disk can not be compared with DNA. In the human genome, 1 grams of weight can contain billions of GB of data, and 1 mg molecule information storage space can contain all the books of the Library of Congress, and there are surplus. In the past, these were just theoretical concepts. Now, a new study suggests that researchers can store the content of a genetic textbook in 1 pico grams (picogram, equivalent to One-zero grams) of DNA, a technical ...

HDFS (Hadoop Distributed File System) is the core of the Hadoop project, is the basis of data storage management in distributed computing, and frankly HDFS is a good distributed file system, it has many advantages, but there are some disadvantages, Includes: not suitable for low latency data access, inability to efficiently store large numbers of small files, no support for multiple user writes, and arbitrary modification of files. When the Apache Software Foundation was established, HDFs had been trying to improve its performance and usability, and frankly, it might ...

Now for large data centers there is another way to apply to individual users, as well as the management of user-level data within the enterprise. We know that in the telecom data room, our storage device our servers are used for dedicated devices, and few systems for individual users to service. With the increasing number of personal users and the increasing number of PCs, it is a very important question how to backup and protect data in personal computers and data on PC or working machine. And now after a unified ...

All indications are that 10,000 trillion and 40,000 gigabit Ethernet will be implemented in the coming years. For example, it discusses the enhanced architecture research and development that Cisco continued to the end of 2011, from the server network interface to the core network, and referred to Cisco's fiber-optic switch route map based on commercial silicon, code-named "Gravel Machine". There are many interesting predictions, such as 10GB Ethernet and GB Ethernet. Expect to see a large number of server boards that support 10GB. At the beginning of the year, you can even see many 10GB Ethernet interface motherboards. All this means that we are already in the application of GB ...

How to use the Internet to transform the traditional industry, from the line to kill to the line? 　　Sneaking three years of bin, began to breathe a sigh of relief. 　　He founded the company deployed more than 10,000 vending machines, accounting for China's total vending machine one-third, quietly become China's largest vending machine operators. Vending machine was born in the last century 60-70, the earliest originated in Europe and the United States, but the best development in Japan. 　　Japanese land area is small, the resources are extremely scarce, the human cost is high, gives the vending machine very good growth soil. In Japan, vending machines cover the street small ...

Youdao said to do education, seems to have some time, has long been not the sun under the new. But the previous attempt has been silent, never as today so looks like "the true"-Ding Lei Platform, the release of open platform strategy and product matrix, the way to finally determine the direction, took out the final version of the online education products. What does the Youdao do? Youdao in today's conference announced that Youdao Dictionary will be in the latest version of the app "Discovery" channel, the introduction of online education open platform. Youdao Dictionary Advantage is its 400 million users, and the reason to choose from tools to the platform, is the hope to have teaching ...

"I have a friend who wants to brew a beer, but he's short of money, can I get a platform to help them?" "4 years ago, Rick Chen, with this idea to create a platform Pozible, now Pozible has developed into Australia's largest platform, four years on the line of 6,000 projects, a total of 20 million Australian dollars, about 116 million yuan." But interestingly, Rick is a real Chinese, his Chinese name is Chen, the University of Northwestern Technical College of Mechanical design and manufacturing, 2007 to study digital media design in Sydney ...

"I have a friend who wants to brew a beer, but he's short of money, can I get a platform to help them?" "4 years ago, Rick Chen, with this idea to create a platform Pozible, now Pozible has developed into Australia's largest platform, four years on the line of 6,000 projects, a total of 20 million Australian dollars, about 116 million yuan." But interestingly, Rick is a real Chinese, his Chinese name is Chen, the University of Northwestern Technical College of Mechanical design and manufacturing, 2007 to study digital media design in Sydney ...

The "Keylogger", which records the account number and password input, has sparked concern over the past few days. 　　In this respect, some netizens published the test report in the Nutshell network, saying that "' keylogger ' really exists and is much more powerful than we think." Look like a U disk "if you go to Internet cafes or public places online, see as shown in the picture (object) connected to your keyboard line above, please do not use this computer." October 15, @ CCTV Finance in the official Micro said, the figure is connected with keyboard and mainframe USB sockets of the humble equipment, you can record the Internet people all the keyboard exercise ...

Absrtact: The phenomenon of shopping cart abandonment (Shopping cart abandonment) has attracted the attention of online retailing industry. The so-called shopping cart abandonment means that the consumer puts the product into the online shopping cart but leaves the transaction unfinished. But the phenomenon of "shopping cart abandonment" (Shopping cart abandonment), a market research agency BI Intelligen, has attracted the attention of online retailing. The so-called shopping cart abandonment refers to the consumer putting the goods into the online shopping cart, but leaving ...

Absrtact: While traditional retailing embraces the Internet, the offline layout of large electric business enterprises is also starting to accelerate. Following the Beijing-East cooperation mode in Singapore under the deep line, the United States makeup Electric dealers in the first entity shop on December 23, 2013 settled in the front door, after understanding, gathered in the traditional retail embrace the Internet at the same time, large electric business enterprises under the offline layout also began to speed up. Following the Beijing-East cooperation mode in Singapore under the line, the United States makeup Electric business poly Excellent products in the first entity shop also settled in the front door on December 23, 2013, after the understanding, poly-Excellent goods entity store business hours from 9:30 to ...

Abstract: Once sparked a war of words, and once out of the merger of the gossip of Ctrip and where to go to war yesterday. Ctrip yesterday openly accused to go where through a large number of vest agents and technical means to give priority, search comparison platform of the impartiality of the total loss, once triggered a "war of words", and once out of the merger "gossip" of the Ctrip and where yesterday and "war". Ctrip yesterday publicly accused to go where through a large number of "vest" agents and other methods and technical means to give priority, search compared to the fairness of the platform completely lost, Ctrip has taken the initiative to the hotel products from where to the offline. I don't want to go anywhere.

Absrtact: On 5th, the 2014 Guangdong Apparel Development Conference, the Guangdong Apparel Industry Association issued the first "Guangdong Apparel e-commerce Industry Development Trend Report", the report showed that 2013 China Electronics [0.54%] Total business transactions exceeded 10 trillion yuan, pre On 5th, the 2014 Guangdong Apparel Manufacturers Development conference, Guangdong Apparel Industry association issued the first "Guangdong Apparel e-commerce Industry Development Trend Report", the report showed that 2013 China Electronics [0.54%] Total business transactions exceeded 10 trillion yuan, is expected to 20 ...