How To Slave

2010 should be remembered because SQL will die this year. This year, the relational database is on the verge of falling, and this year developers found they no longer needed long, laborious columns or tables to store data. 2010 will be the starting year for document databases. Although this momentum has lasted for many years, it is now the era of more and broader document-based databases. From cloud-based Amazon to Google, a large number of open source tools, and the ensuing CouchDB and MongoDB. So what is MongoD ...

In MySQL, using the id field of the auto_increment type as the primary key of a table and using it as a foreign key to other tables to form a "master-slave table structure" is a common usage in database design. However, in the specific generation of id, our order of operations is generally: insert records in the main table, and then get the automatically generated id, based on it to insert the record from the table. There is a difficulty here, is inserted into the main table record, how to get it corresponds to the id. The usual practice is through "select max (id) from table ...

OpenStack Object Storage (Swift) is one of the subprojects of the OpenStack Open source Cloud project, known as Object storage, which provides powerful extensibility, redundancy, and durability. This article will describe swift in terms of architecture, principles, and practices. Swift is not a file system or a real-time data storage system, which is called object storage and is used for long-term storage of permanent types of static data that can be retrieved, adjusted, and updated as necessary. Examples of data types that are best suited for storage are virtual machine mirroring, picture saving ...

Foreword in the first article of this series: using Hadoop for distributed parallel programming, part 1th: Basic concepts and installation deployment, introduced the MapReduce computing model, Distributed File System HDFS, distributed parallel Computing and other basic principles, and detailed how to install Hadoop, How to run a parallel program based on Hadoop in a stand-alone and pseudo distributed environment (with multiple process simulations on a single machine). In the second article of this series: using Hadoop for distributed parallel programming, ...

Property market regulation of the new deal, buyers are diverse, speculation investors said: No pressure, adjust a tune, future more health summary: This 51 holiday, Guangzhou property market turnover plunged nearly 80%. In the face of dismal transcripts, some developers are still in order to take advantage of the location of hard to carry prices, and some developers have slightly clever darkened prices.　　In the storm-like regulation, buyers, investors, ants and mortgage slaves have changed their views on the property market. This year 51 holiday, Guangzhou property market turnover plunged nearly 80%. In the face of dismal transcripts, some developers are still in a lot of superiority of the price ...

Millet, every guest, carving ye beef brisket, Huang Taiji pancake, countless dozen "internet thinking" small company 0 cost marketing, reverse hit the big brand, its "internet flavor" of the copy work. So how to write a copy of the Internet thinking? 1, the decomposition of product properties Internet start-ups all divide the product into independent properties. Millet first for us to popularize the CPU, GPU and so on, to the Millet 4, unexpectedly began to give us universal knowledge of materials-"Millet 4, Olympic sports 304 stainless steel, 8 times CNC stamping molding." Even with Lei to learn from every guest aged also not to be outdone, in ...

Ada holding a huge belly (1/11 Zhang) with his daughter's Ada due to be transmitted this week, however, the imminent birth of Ada (ADA) is not like the general pregnant woman stay at home, but love around. Faith in Christ's Ada No-holds, almost guilty of pregnant women taboo, not only to the perm to see horror film, the biggest bogey is a new house big decoration, and she was a huge belly of her every two 3rd to the dust rolling new home in person slave, God protection is not buxinxie. [Page] Ada inspected the new home (2/11 sheets) [page] sang cross tattoo Exposure (3/11) [...

Recently, Clay.io's Zoli Kahan began writing "10X" series of posts. Through this series of posts, Zoli will share how to use only a small team to support Clay.io's large-scale applications. The first share is an inventory of the technology used by Clay.io. CloudFlare CloudFlare is primarily responsible for supporting DNS and as a buffer proxy for DDoS attacks while cloud ...

Absrtact: This afternoon, Acer founder Shih in a keynote speech on the theme of Syntao, kingly and change, and talked about his views on business from the way of chess, business and change. The following is the focus of sharp observation: 1, Chess way. Shih said that this afternoon, Acer founder Shih in a keynote speech on the theme of "Business, kingly, and Change", respectively, from chess, business, and change the way they talk about their views on the business. The following is the focus of sharp observation: 1, Chess way. Shih said that there is a connection between the chess and the Commercial Road, the chess game as a metaphor, ...

Reporter: Shi yao chen is very thin, not like Guofu so valiant, nor like Cui flat so coarse hand feet, small face, big mouth, cold nose slightly red, serious and quiet big eyes involuntarily in a state of sub-humid. At the beginning of the year, the comedy heroine in the TV series became a supporting actress on the big screen.　　Or a special department of funny, "the martial arts" in the Guofu like a Erhualian, "not sincere don't disturb 2" Mango is a slightly happy Hua Dan. Received "Non 2" filming invitation, Chen Yao is very happy, Feng Xiaogang's film she has seen, "he has been a quality assured director ..."

Andy Lau Gong Li, "I Know Women's heart" Sandra such as Koo Hand "magic Man" Shimao director of the debut "Quit Smoking Not Temperance" poster cartoon "Panda story" Sina Entertainment News 2011 Spring Festival Lunar (February 3), "I know Women's hearts", "quit smoking and Alcohol", "Magic Hero" and "Panda story" Four large tracts of the same day release, Rob Spring Festival Lunar New Year file.　　Although the theme of four film, different styles, but surreal easy witty tone does not change, and look at Sina Entertainment full disclosure of the film. "I Know Woman Heart": Gong Li career Queen ...

Zhejiang satellite TV's "one elder sister" Zhudan (1/9) Zhejiang satellite TV's "one elder sister" Zhudan recent exposure rate is very high, earlier she and too the wheat field Mister Songkogang was burst madly in love immediately and announced the breakup, let the person feel bewildering. September 21, the starring role of the upcoming "Love Female Anchor" is about to be aired, Zhudan recently more to run in the major publicity activities. As one of the "most red" female hosts, Zhudan is inevitably taken to compare with the Hunan TV's Xie Na. In this respect, Zhudan in an interview with Yangcheng Evening News reporter said: "I have a kind of feeling with Xie Na XI!" "Do not compare with Xie na ...

Function Description: UUCP file transfer Service program. Syntax: uucico&http://www.aliyun.com/zixun/aggregation/37954.html >nbsp; [-CCDEFQVWZ] [-i< Type] [-i< Document] [-p< Connection Port number [-] [RL] [-s< Host [-s< Host [-u& ...

Mo "under Nanyang" "Beaten" Stills mo "Xia Nanyang" "Kuoshao" still Sina Entertainment date, directed by director Shenhofang Director, young actor Mo, Tong greatly, Huangshengyi, Dongley and other starring, to reflect the theme of Hakka culture TV series "under Nanyang" is the CCTV hit.　　"Personality Boy" Mo in the play "mistaken for piglets," The Broad master Tang, in order to pursue love life. It is reported that in the "next Nanyang" Story, "Tang" as "Tanggu Kuoshao", could have lived a life of worry-free, according to the father's arrangement, to marry a suit of drift ...

Highly available ha (high availability) refers to improving system and application availability by minimizing downtime due to day-to-day maintenance operations (schedules) and burst system crashes (unplanned). It is different from the fault tolerant technique which is considered to be uninterrupted operation. The HA system is the most effective way for enterprises to prevent the core computer systems from being shut down. Features of high Availability (HA) 1, software fault monitoring and exclusion 2, backup and Data protection 3, management station can monitor the operation of each site, can be at any time or timing report system operation ...

As early as the internet was born, it was designed as a peer-to-peer network. With the rise of the Windows system in the 90 's, Peer-to-peer network gradually disappeared, CS mode began to prevail. In this master-slave architecture, the performance of the server is quite strong compared to the client, so ordinary Internet users cannot build the server and maintain its operation. Most of the data is still stored on the client computer, but the server continues to monitor the client's behavior. From the CS to the platform cloud technology, is through the network to the vast number of computing process decomposition into more subroutines, and then through the server system analysis ...

Research on the cloud computing integration of agricultural IoT application layer based on message forwarding model Wang San Wei Liu Feng Juan Zhang Tianji In view of the problem of island effect in agricultural Internet application layer communication, this paper uses workflow engine and message forwarding mode method to study the integration of agricultural IoT integrated communication platform. Based on the analysis of IoT platform and Cloud computing program, a workflow engine model based on message middleware is proposed to be applied to the integrated communication platform of agricultural IoT. The test results show that: through the expansion of POP3, SMTP, XMPP and other communication protocols ...

Human beings in an era of information, digital floods are fast approaching-to meet the challenge, is a new computing architecture, known as "Cloud Computing" (Cloud Computing). 2010 is known as China's cloud computing development year. In mass media and public discourse, cloud computing looms large as a buzzword. 　　From traditional hardware and software vendors, to it solution providers, to internet companies, almost every business has launched its own cloud computing strategic planning. China "Cloud blue ...

Xu Jingpo in Tokyo, a Japanese multinational working in Beijing, Dong, these days are very anxious. The personnel department of the company has consulted with him, preparing to transfer him to Shanghai next March, and he has just married a Japanese classmate as his wife half a year ago. "The man to everywhere is the same, anyway pay a lot of you a dollar." Dong thought so. But there are two questions that worry him: What about the new house in Tokyo?　　The second is to buy a house in Shanghai? And his wife discussed several times, the wife always answer the same sentence: "You decide it." In fact, she would like to live in Shanghai, because she felt the world ...

Companies such as IBM®, Google, VMWare and Amazon have started offering cloud computing products and strategies. This article explains how to build a MapReduce framework using Apache Hadoop to build a Hadoop cluster and how to create a sample MapReduce application that runs on Hadoop. Also discusses how to set time/disk-consuming ...