nosql database schema design

Document directory Concepts Tall-narrow vs. Flat-wide tables Partial key scans Pagination Time Series Time ordered relations Implicit Versioning Custom Versioning This chapter mainly describes how to design hbase schema. We strongly recommend the following presentation for this topic, which is clearly written.First, I once again stressed that nosql ca

Basic concepts of one or two peopleNoSQL, which refers to non-relational databases.Relational database is a database based on the relational model.The relational model is mentioned here,The relational model was proposed by E.f.codd in 1970.Compared with the level and mesh model, it has the following characteristics:1. Simple data structure (two-dimensional table)2. A solid theoretical basis.A. Relational op

relational model. In addition, because the document database transaction support is also relatively weak, general NoSQL will only provide a row lock. This also adds more difficulty to the design schema. There are a lot of things to note about the use of document databases, and this article focuses only on the part of

I. Brief introduction of the expertsVOLTDB's chief technology officer, Ryan Betts, says that SQL has won widespread deployments of large companies, and that big data is another area that it can support.NoSQL is a viable option and, in many ways, it's the best choice for big data, especially when it comes to scalability, says Bob Wiederhold, chief executive of Couchbase Corporation.second, the test of the time of SQL, and is still boomingStructured Query Language (SQL), a time-tested winner, has

The original business process platform approval sheet uses the idea of horizontal table vertical storage, where the data for the business forms used by all processes exists in a physical table, and each data record in the table contains the field information for the column definition and value,column, defined by the definition table. This approach is implemented, it is necessary to use code for data assembly, more cumbersome. When the form is large, the interface shows a slow performance. This s

Tags: nosql NoSQL Basic Concepts and MongoDB MongoDB Basic Application MongoDB Index and copy set The concept of database sharding and the realization of MongoDB sharding I. The basic concept of NoSQLNoSQL (not just SQL), is a technical genre, non-relational

explanation for NoSQL is "non-relational", and "not only SQL" is also accepted by many people. (The term "NoSQL" was first used in the name of a lightweight relational database in 1998.) ）NoSQL is the most used Key-value storage, of course, there are other document-type, column storage, graph

Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to a deluge of research and practice on protocols and algorithms. In this article, I will make some systematic descriptions of the distributed features of the NoSQL database. The scalability of the system is the main reason to drive the dev

In the previous article, we discussed the main differences between SQL and NoSQL databases. Next, we'll use the knowledge in the previous article to determine how to determine the better choice in a particular scenario.First, let's summarize:SQL database: You need to define the underlying schema before using the table encourage

NoSQL systems generally advertise a feature, that is, good performance. Why? After so many years of development in relational databases, various optimizations have been done very deeply. NoSQL systems generally use relational database technology. What factors have bound the performance of relational databases? We can look at this problem from the perspective of s

Kristóf Kovács, a software architect and consultant, recently released an article comparing various types of NoSQL databases. Although the SQL database is a very useful tool, the monopoly is about to be broken after a 15-year solo show. It was only a matter of time: forced to use relational databases, but found that the inability to adapt to demand was too numerous. But the differences between the

Label:first, the basic knowledge of NoSQL 1. About NoSQL The term "NoSQL" is actually created by a colleague called Racker, when John Evanseric to organize an event to discuss open source distributed databases. This is the name and concept. Some people oppose the NoSQL term because it sounds like we define what we are.

Tags: daily capacity large number of scene mode shopping cart economic bidding copy Dynamodb is a fully managed NoSQL database service. Customers can easily use Dynamodb's services. Enjoy high performance, massive scalability and persistent data protection at the same time. The Dynamodb database was published by Amazon on January 18, 2012.It incorporates Amazon'

because they are used to relational databases. To dynamically build relationships between objects, attributes of objects can be dynamically added or subtracted. you can consider graph databases because they do not need schema and can be modeled on demand in code. To support large audio and video files, you can look at storage services such as S3. NoSQL is not suitable for storing BLOBS, although MongoDB

Source: http://www.cnblogs.com/chay1227/archive/2013/03/17/2964020.htmlThe relational database represents all of the data through the two-dollar representation of rows and columns.The benefits of a relational database:1. Maintain data consistency (transaction processing)2. Due to standardization, the cost of updating data is small (the same fields are basically only one place)3. Complex queries such as join

The scalability of NoSQL systems is the main reason for the development of NoSQL, including distributed system coordination, failover, resource management and many other features. In this case, NoSQL sounds like a big basket, and everything can be inserted. Although the NoSQL movement has not brought about fundamental

mechanism that continuously monitors your nodes and automatically shifts to the best possible node in the event of a failure. This process should be as transparent as possible to your application and ideally you should not need any configuration changes. The most advanced solution is to modify the IP address of the Data storage node in DNS, which ensures that your recovery process takes only a few seconds to complete. Your automatic failover should be based on the request set (Quorum) and ach

.2. schema supports references between schemas, and type redefinition or extension. It is very easy to reuse or reorganize existing definitions, and annotation can be inherited.3. schema is language-independent. What does it mean? The schema definition can be implemented in different languages.4. The rule engine is the business layer, and

This article by Bole Online-Tang Yuhua translation from Kristóf Kovács. Welcome to the technical translation team. Please refer to the requirements at the end of this article for reprint. Guide: Kristóf Kovács is a software architect and consultant who recently published an article comparing various types of NoSQL databases. Although SQL database is a very useful tool, the monopoly is about to be broken aft

the practical application to achieve weaknesses, in general, these nosql mainly used to solve the following problems1. Small amount of data storage, high-speed read and write access. This kind of product through the data all In-momery way to guarantee the high speed access, simultaneously provides the data landing function, actually this is the Redis most main application scenario.2. Massive data storage, distributed system support, data consistency