mongodb vs relational database performance

mechanism of the database itself, the use of a large number of concurrent users, the efficiency of storage space, as well as the integrity and security of data and other aspects of higher requirements. These are not the traditional relational database, the use of two-dimensional table simple structure can be satisfied.Relational

The origin of the codd RDBMS12 rule--rdbms Edgar Frank Codd (Edgar Frank Code) was hailed as "the father of relational databases" and was awarded the Turing Prize in 1981 for his outstanding contribution to the theory and practice of the database management system. In 1985, Dr. Codd issued 12 rules that succinctly define the concept of a relational

Tags: des blog http using strong dataI believe that the development experience of friends have encountered such a demand. Suppose you are developing a comment function for a news site, and readers can comment on the original text or even reply to each other.This need is not simple, mutual reply will lead to an infinite number of branches, an infinite number of ancestor-descendant relationships. This is a typical recursive relational data.For this prob

Server: The parallel implementation and coexistence model is immature. It is difficult to handle an increasing number of users and data volumes. Limited scalability. ORACLE: Parallel servers extend the capabilities of WINDOWNT by enabling a set of nodes to share work in the same cluster, providing solutions for high availability and highly scalable clusters. DB2: It has good parallelism. 3. Security SQL Server: No security certificate was obtained. ORACLE: Obtains the highest certification leve

analysis and case of RDS availability of Aliyun relational database relational database service (relational DB service, RDS) is an open, reliable, flexible and scalable online database service. With multiple security measures and

II The figure above is 6 indexed fields, which can be hundreds or even more and need to be brushed against multiple index fields. Query performance is getting lower and even unable to meet query requirements. Limitations in relational data are also beginning to appear, so many people are beginning to touch NoSQL. Column family database is very powerful, many peo

In SQL Server 2008, the relational database engine is relatively new, and this article will focus on the new features that application developers and database administrators are more concerned about. New features related to developers: Change Data Capture (CDC): variable capture, which captures new, modified, and updated SQL Server data tables and is available

This is the Oracle Coherence 3.5 book, Chapter One: Achieving performance, Scalability, and availability Objectives, section II: Achieving Scalability, the database extends the part of the reading notes.Traditional relational databases are difficult to scale, usually vertically scaled, but scale horizontally only when they reach a certain level.The scale-out of t

Question:Preliminary understanding of multidimensional database and relational database are table storage, but in the cube is called the fact table, the dimension table, do the analysis of the relational database can do it? (the book says that the multidimensional

relational database design is the process of organizing and structuring data, and the core problem is the design of relational model. A relational model is a mathematical model that describes the relationship between entities by using two-dimensional tabular data, which is the collection of all

MongoDB is a database based on distributed file storage. Written by the C + + language. Designed to provide scalable, high-performance data storage solutions for WEB applications. MongoDB is a product between a relational database

Label:The concept of the data hierarchy:Data hierarchy is an important relation of expressing data, in the design of database , such as: organizational structure decomposition, work task decomposition, Division of administrative divisions, etc. are the typical examples of hierarchical relational data.　　The data that expresses the hierarchical relationship generally requires the following properties to be im

The primary key and foreign key are the adhesives that organize multiple tables into a valid relational database. The primary key and foreign key design have a decisive impact on the performance and availability of the physical database. The database mode must be converted f

In the design phase, Data normalization may take more time than any other task. The more data, the longer the process takes. Based on past experience, you may find that the most difficult thing to do is to meet all the requirements of 1nf, because when you move duplicate values to another table, improper dependencies are often eliminated.　　After completing the most difficult part, you may choose to stop after 1nf, but do not. Please continue to normalize the data through the second Paradigm (2nf

First, index MongoDB provides a variety of index support, indexed information is kept in system.indexes, and the default is always to create an index for _id, which uses the same relational database as MySQL. In fact, it can be said that the index is over the data storage system on top of the other layer of system, so the different structure of storage have the

relational patterns that conform to a certain level, representing the degree of rationalization of the connections among the attributes within a relationship". It's very obscure. You can actually interpret it roughly as the level of a design standard that a table structure of a datasheet conforms to. Like home decoration to buy building materials, the most environmentally friendly is the E0 level, followed by the E1 level, there are E2 level and so o

efficient.2. The enumeration path can visually show the path between ancestors and descendants, but because the referential integrity is not ensured, this design is more fragile. The enumeration path also makes the storage of the data redundant.3. Nested sets are a smart solution, but they are not guaranteed referential integrity and can only be used for queries with high performance requirements, while others are generally required.4, the closure ta

Label:NoSQL refers to non-relational database Features: 1. Handling ultra-large amounts of data 2. Run on a cheap PC server cluster 3. Shatter the bottleneck of performance Redis is a high-performance Key-value database that stores value types including string strings, list

The topic is not very accurate, because the database does not provide paging , ranking and other functions, providing only data access, page ranking these are our database-based practical cases only. However, whether it is Redis or MongoDB, there are usually some common ways to do paging and ranking. This article introduces some test data to show you the

Configure MongoDB configuration items in the configuration file and back up and restore the database, mongodb backup and recoveryI. mongoDB command line startup option Configuration When mongodb is started using the command line, we can select some options to change the conf