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This article is my second time reading Hadoop 0.20.2 notes, encountered many problems in the reading process, and ultimately through a variety of ways to solve most of the. 　　Hadoop the whole system is well designed, the source code is worth learning distributed students read, will be all notes one by one post, hope to facilitate reading Hadoop source code, less detours. 1 serialization core Technology The objectwritable in 0.20.2 version Hadoop supports the following types of data format serialization: Data type examples say ...

The eagle and the Big Bear fought, what, you don't know who is the Big Bear? Well, now you know who wins and who loses. The ins and outs of the matter is this, omnipotent Big Bear sent an article "Carving ye beef brisket why not succeed?" ", is said to be very fire, carving ye sit not live, also wrote an article" Carve ye personally uncover: carving ye beef brisket why failed? . Seriously, you lose. Who is more famous, master Carver and Mighty Bear? Naturally, when you refute the Big bear, you are really famous for the Big Bear. The carving ye once tried to trick, that year so war traditional catering enterprise, now ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall This article is for the SEO crowd's Python programming language introductory course, also applies to other does not have the program Foundation but wants to learn some procedures, solves the simple actual application demand the crowd. 　　In the later will try to use the most basic angle to introduce this language. 　　I was going to find an introductory tutorial on the Internet, but since Python is rarely the language that programmers learn in their first contact program, it's not much of an online tutorial, or a decision to write it yourself. If not ...

Writing in front of the recent study on the design patterns of the article, read the Terrylee and Lu Zhenyu two teachers wrote a series of design patterns, the harvest is very abundant, but also let me have a new understanding of oop,ood and understanding, but in the factory to see a few articles, But there is always a place to think, hope that teachers and experts can answer for the next question, the following is their own understanding of the factory model and proposed an improvement plan, do not know whether someone has proposed similar scheme, if there is a coincidence is purely coincidental. If there is a wrong place to criticize ...

This article covers some JVM principles and Java bytecode Directives, recommend interested readers to read a classic book on the JVM, Deep Java Virtual Machine (2nd edition), and compare it with the IL assembly directives I described in ". NET 4.0 object-oriented Programming". Believe that readers will have some inspiration. 　　It is one of the most effective learning methods to compare the similarities and differences of two similar things carefully. In the future, I will also release other articles on personal blog, hoping to help readers of the book broaden their horizons, inspire thinking, we discuss technology together ...

The price competition between Suning appliance Day K electricity business is never broken, but on August 15, Jingdong, Gome, suning as the core of a large household appliances price of the "Three Kingdoms kill" is unprecedented fierce, electric business giants have shown "price off the line", but also to the CEO, the official caliber, so that countless onlookers of the public netizens blood. Why does this round of "price war" start? Is the electric dealer for show hype or live ammunition? How much has the island city's home appliance price dropped? How much will the war eventually burn? 　　15th, reporters multi-party interview, this series of questions layer chrysalis. Jing Dong Online stickers ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall in understanding the Internet entrepreneurship Theory knowledge, began the field to carry out the actual operation of the website business. 　　In this chapter, we will explain in detail how to build a Web site that conforms to the user experience. Web page planning and style design second, the choice of the website programming language third, the choice of website database four, the Web site's hardware requirements and preparation of five, server hosting and maintenance of the above content can be read to the article "Internet entrepreneurship success of the Road (iii): Web server ...

It's Wednesday today! For the He Mei drama "Black List", "Bankrupt sister", "Homeland Security" has not been updated? Too bad, nothing to do ... Time is still early, unintentional sleep, simply code word. What's the code point? Suddenly remembered, these two days, constantly someone micro Bo @ I, said there is a "incompetent Big bear" a stupid, wrote an article "Carving ye beef brisket Why not success" silly, shout I retort, I just laugh crazy, what? The last three years catering industry, there are more successful than the case of carving beef brisket? Why don't you write an essay on why Millet won't succeed? Oh, that's right.

What is the difference between the entrepreneur and the predecessor? The network popularization brings the pluralistic thought, the material wealth brings the ego center and the money worship, these once affixed to the body's label once again pastes in the person. The most important feature of the founder's own description is probably the aversion to labeling. But in the business world, no matter how they justify and try to break out of "a", all capital and big companies are still eager to understand them and define them because they represent the future. We are looking for these 13 interviews, of course, not enough ...

Although the "editor's note" has been available for 9 years, the popularity of Mongodb,hamsterdb is still lacking, and it has been rated as a Non-mainstream database. Hamsterdb is an open source key value type database. However, unlike other Nosql,hamsterdb, which are single-threaded and not distributed, they are designed to be more like a column store database, while also supporting acid transactions at the Read-committed isolation level. Then compare Leveldb,hamsterdb will have any advantage, here we go ...