Best Database For Hierarchical Data

Relative to structured data (the data is stored in the database, it is possible to use two-dimensional table structure to express the implementation data logically, the data that is not convenient to use the database two-dimensional logical table to represent is called unstructured data, including all format Office documents, text, picture, XML, HTML, various kinds of reports, images and audio/ 　　Video information and so on. An unstructured database is a database with a variable field length and a record of each field that can be made up of repeatable or repeatable child fields, not only to handle structured data (such as numbers, symbols, etc.), but also ...

Shrinking to achieve, in Alibaba's 2017 double 11 singles day, our domestic trading unit used cloud resources to sharpen and expand at the peak, and after the spike, the expansion resources will be returned to the cloud, but in the actual operation, we really want What can we do to get the resources to the cloud when we need it, and go smoothly when we don't need it.

Recently busy graduate design, the need for document translation. I thought that before the translation of a poor, but always feel not rigorous enough. My graduation project is mainly to help the teacher's institute to be a website, already have a website, but the teacher and I think the old version of the site is very old. So volunteered. The site needs to be refactored, and the Natural Information Architecture section is an important part of it, though it has also been seen quite a bit before, such as "thinking of the OR search in the kitchen" is a sign of thought, but systematically translating the Five Simple Steps team Works of "A Practical G ...

The types of network patterns that people use to compile, publish, and exchange data determine their security over the network. This poses the question of whether the flat model will provide the best security option for cloud computing. First, this pattern helps create a more direct relationship between a data provider and a receiver than a layered structure. A hierarchical structure is a network in which access and core are not known in the distribution path, as well as other integration endpoints. Flat systems have access and endpoints only. This essentially eliminates the need for mediations, leading to faster and more reliable information retrieval. The basic question is: this is still ...

Before introducing the microblogging recommendation algorithm, let's talk about recommendation systems and recommended algorithms. There are some questions: what scenarios does the recommendation system apply to? What are the problems and what value are they used to solve? How is the effect measured? The recommendation system was born very early, but was really valued by everyone, originated from the "Facebook" as the representative of the rise of social networks and "Taobao" as the representative of the prosperity of the electric business, "choice" of the era has come, information and items of great wealth, so that users such as the vast universe of small points, at a loss. The recommendation system ushered in an outbreak of opportunity to become closer to the user: fast ...

This paper is translated by Lu Bo, author of the Graduate School of Design, Jiangnan University, Anastasios Karafillis, to view the original although navigation is a vital part of the user experience, it is only one way to achieve the goal (find content). Users have different expectations of content and navigation, content should be unique, amazing or exciting, and navigation should be as simple and predictable as possible. The articles in this series are divided into two parts, with four steps to simplify navigation effectively. By analyzing the type and number of content, select and carefully design the correct type of navigation menu. Create a ...

With a growing number of Web fonts, paid Web font services, and off-the-shelf tools, typography takes back its title as the Queen of Design and is the key to all graphics and web design. Today, many designers in the design of typesetting, the main consideration is essentially aesthetic issues. The problem is that we are used to treating typography and font design as two interchangeable terms, but actually they are different. Take a quick look at the label "typography" on the dribbble and see the trend immediately. The perfect use of the temptation of font design will affect our trial ...

The intermediary transaction SEO diagnose Taobao guest Cloud host technology Hall Station group, believed that many stationmaster are more concerned, A5 Group purchase also arranged several station group management software buys, the field is hot. 　　Near the time of the various key words in Baidu ranked the first few pages of the incident, let everyone see the strength of the station group, do not know whether seoer feel the pressure. January 6 Admin5 Thursday Edition chat activity, together A5 Group purchase channel http://tuan.admin5.com organization about "the station group development and the profit pattern discussion" question ...

While Hadoop is the hottest topic in the bustling Big data field right now, it is certainly not a panacea for all the challenges of data center and data management. 　　With that in mind, we don't want to speculate about what the platform will look like in the future, nor do we want to speculate on the future of open source technology for various data-intensive solutions, but instead focus on real-world applications that make Hadoop more and more hot. One of the cases: ebay's Hadoop environment ebay Analytics Platform Development Group Anil Madan discusses how the auction industry's giants are charging ...

While Hadoop is the hottest topic in the bustling Big data field right now, it is certainly not a panacea for all the challenges of data center and data management. 　　With that in mind, we don't want to speculate about what the platform will look like in the future, nor do we want to speculate on the future of open source technology for various data-intensive solutions, but instead focus on real-world applications that make Hadoop more and more hot. One of the cases: ebay's Hadoop environment ebay Analytics Platform Development Group Anil Madan discusses how the auction industry's giants are charging ...