Database Index Explained

As a http://www.aliyun.com/zixun/aggregation/6434.html "> software developer, we value the abstraction of things." The simpler the API, the more attractive it is to us. 　　Dialectically, the biggest advantage of MongoDB is the "elegant" API and its agility, which makes the coding process of developers unusually simple. However, when MongoDB involves large data scalability issues, developers still need to know the bottom of it ...

Cassandra is a mixed relational database, similar to Google's bigtable. Its main function is richer than the dynomite (distributed Key-value Storage System), but the support degree is inferior to the document storage MongoDB (the open source product between the relational database and the non relational database, the relational database has the richest function, most resembles the relational database. The supported data structure is very loose and is a JSON-like Bjson format, so you can store more complex data types. ) Cassa ...

Baidu Weight Query Webmaster trading Links Exchange Site monitoring Server monitoring SEO webmaster Longest said a mantra is: do not understand the principle of search engine seoer is in the nude! According to the above figure explained the search engine working principle, the author should step by step for everybody explanation, explained. Complete SEO basic knowledge popularization. 1, www: Our Internet, a huge, complex system; 2, the Collector: this we are familiar with the webmaster, we are commonly known as spiders, reptiles, and his job is to visit ...

The logical design of database is a very broad problem. In this paper, the main key design of the table is discussed in the design of MS SQL Server, and the corresponding solutions are given. Primary key design status and problems about database table primary key design, in general, based on business requirements, based on business logic, the formation of primary key. For example, when sales to record sales, generally need two tables, one is the summary description of the sales list, records such as sales number, the total amount of a class of cases, and the other table record of each commodity ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology lobby search engine What is the most important? Some people would say the accuracy of the query results, some people will say that the query results of the richness, but in fact these are not the most fatal search engine places. For search engines, the most fatal is the query time. 　　Imagine, if you are in the Baidu interface query a keyword, the result will take 5 minutes to your query results feedback to you, the result must be you quickly discard Baidu. Search engines in order to meet the demanding speed (now business search leads ...)

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. First, the site's page planning and style design, 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 six, server performance test seven, domain name query and registration eight, the actual combat exercise ...

Sometimes the best way to learn about a software product is to see how it is used. It can solve what problems and how these solutions apply to large application architectures that can tell you a lot. Because HBase has a lot of open product deployments, we can do just that. 　　This section describes in detail some of the scenarios in which people successfully use HBase. Note: Do not limit yourself to the belief that hbase can only solve these usage scenarios. It is a nascent technology, and innovation based on the use of the scene is driving the development of the system. If you have new ideas, think you can benefit from HBAs ...

This series of articles is a learning record about the fundamentals of azure services development, and because of time constraints, the process of wishing to discuss and explore yourself is from scratch, to be able to develop basic programming for azure services. There may be a very deep topic relative to each topic, and I would like to have time to do it through other articles. 　　The positioning of this series is basically positioning, take 20-30 minutes, download the code first, follow the article, run to get the relevant experience. The previous article is about Azure queue storage, this is about ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall website completes, the maintenance and the management becomes the work which needs to carry on continuously. 　　In this chapter, the site will be optimized for internal links, efficient maintenance, PR upgrade way to introduce. First, optimize the site's internal links within the site is the site domain name links, such as columns, links between the pages and so on. 　　Do the internal link optimization, will enhance the user to the site browsing the actual experience, help enhance the competitiveness of the site. 1. Column navigation According to the importance of ranking now big ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall Maoseomao the first search engine principle course, mainly introduces the search engine crawler (or the robot, the spider) is how replaces the artificial collection information. 　　Search engine base What is the search engine? Search engine (foreign representative Google, domestic representative of Baidu), using the program on the Internet crawl site information, crawling back to classify the information for access to search engine Internet users and keyword matching information. For example: you want to buy ...