disadvantages of mongodb

First, why do you want to create an index (advantage)?This is because creating an index can greatly improve the performance of the system.First, by creating a unique index, you can guarantee the uniqueness of each row of data in a database table.Second, it can greatly speed up the retrieval of data, which is the main reason for creating indexes.Thirdly, the connection between tables and tables can be accelerated, particularly in terms of achieving referential integrity of the data.Finally, when

Advantages and disadvantages of embedding an operating system in a Single Chip Microcomputer As early as 1960s, some people began to study and develop embedded operating systems. However, it has not been mentioned more recently in China. The increasing importance of it in areas requiring real-time processing, such as communication, electronics, and automation attracts more and more attention. However, people often talk about some famous commercial

[Discussion] let's talk about the advantages and disadvantages of using stored procedures in php + mysql. I have never seen some open-source systems in projects, and I have never used stored procedures as SQL nbsp; is it necessary to use the stored procedure in the php project; this reduces the pressure on web servers. For more information, see the advantages and disadvantages of using stored procedures in

MySQL disk replication technology-DRBD: advantages and disadvantages comparison, precautions and Best Practices DRBD is the block-level synchronous replication technology implemented by the kernel module. The synchronization level here can be adjusted because DRBD uses the NIC for block replication. If, using Infiniband for transmission can effectively process high concurrency. This is a type of replication storage, which is nothing more like a hot st

Advantages and disadvantages of indexes Why do you create an index? This is because creating an index can greatly improve the performance of the system. First, by creating a unique index, you can guarantee the uniqueness of each row of data in a database table. Second, it can greatly speed up the retrieval of data, which is the main reason for creating indexes. Thirdly, the connection between tables and tables can be accelerated, particularly in term

advertisements can be sent. if manually deleted, it is estimated that all spam advertisements cannot be deleted, therefore, it is a mainstream method to prevent malicious advertisements through the function settings of the forum site building program. I will analyze these methods in view of their advantages and disadvantages. I. new members can post only after they have joined the task. Advantage: software posting machine AI is relatively weak after

, people can't help but appreciate it. Flash websites instantly capture the viewer's attention and are proven to be an effective marketing and promotion method, which has a great impact on viewers. 2. improve website interaction No one like a dead website. The most obvious advantage of a Flash website is its strong interaction. Flash clips are interspersed in the website, flash music videos, Flash titles, Flash navigation, Flash buttons, Flash icons, and other elements, all of which meet the hig

Two years ago, basically all forums and blogsProgramBoth use the UBB editor, but the shortcomings of the UBB editor are obvious. You cannot immediately see the logs you have written. It is not so easy to adjust, in addition, the UBB parser of various programs has different functions. However, the benefits of UBB are also obvious. The program has a strong control over the content and is easy to develop. In view of the obvious disadvantages of UBB, we

Labels: Advantages and Disadvantages of linear table sequential Storage StructureAdvantages: 1. You do not need to add additional storage space to represent the logical relationship between elements in the table.2. You can quickly access any element in a table.Disadvantages: 1. Insert and delete operations require moving a large number of elements.2. When the length of a linear table changes greatly, it is difficult to determine the storage space capa

For large-scale data retrieval, we recommend that you use databases such Because the XML file is a text file, I will not talk about the efficiency of reading text files, but the XML It is also advantageous. For example, we can use its features to distribute the pressure on the database, just like the most typical It's csdn. Why does csdn need to use XML? It requires partial pressure, and the database is no longer needed to read the data. So if you want to do this, you need to clearly identif

continuity problem. The list is better than the array: 1. Insert and delete operations. If an element is inserted in the middle of an array, Then the memory address of all the elements behind this element will be moved backwards. The same is the case with delete. Only the last element of the data is inserted and deleted. The list only needs to change the node information within the node that is necessary to change it. You do not need to change the memory address of the node. 2. The utiliz

The history of Lan native Js:js and the advantages and disadvantages of JavaScriptLan 0 Basic Learning Html5-html+css Foundationhttp://11824614.blog.51cto.com/11814614/1852769JS Introduction　　The history of JSIn the 1995 of the last century, Netscape was the most famous first generation Internet company in the Web era with its navigator browser.Because Netscape wanted to be able to add some dynamic effects to the static HTML page, it was called Brenda

as the overall infrastructure of the system, is responsible for the separation of MVC, controls the business jump in the model part of the Struts framework, supports the persistence layer with the Hibernate framework, manages the spring, manages struts and hibernate. By using object-oriented analysis method, we propose some models, implement these models as basic Java objects, and then write the basic DAO (Data Access Objects) interface, and give the DAO implementation of Hibernate. The DAO cla

Advantages and disadvantages of mysq index Establishment Advantages and necessity of index creation: 1. By creating a unique index, You can ensure the uniqueness of each row of data in the database table; Second, it can greatly speed up data retrieval, which is also the main reason for creating indexes; Third, it can accelerate the connection between tables, especially in achieving Data Reference integrity; Fourth, when using grouping and sorting clau

as those provided by the EJB container, in which case you rely more on EJBS.Before concluding the discussion of this framework, let's list some of the advantages and disadvantages of using JPA as a persistence framework.What are the advantages of JPA?JPA is standards-based. A growing number of providers are looking to provide JPA implementations in the near future.It provides the best features in Hibernate and TopLink.It can be used with Java SE and

Advantages and disadvantages of microservice ArchitectureAbstract: This article is from the official Nginx blog and is the first article in The microservice series. It mainly discusses the shortcomings of traditional monolithic applications and the advantages and challenges of the microservice architecture. As the author said, microservice architecture is more suitable for building complex applications, although it also has its own shortcomings. This

need to install, there is a Web browser can (2) BS architecture can be placed directly on the WAN, through a certain degree of access control to achieve the purpose of multi-client access, interactivity is strong.(3)The BS architecture does not need to upgrade multiple clients to upgrade the server. Cons: (1) on cross-browser, the BS architecture is not satisfactory. (2) It takes a lot of effort to achieve the degree of CS program.(3) The high cost of design for speed and security is the bigges

protocol, providing interface data through the rest API, and using AJAX for asynchronous fetching, which helps to decouple client and server-side work. Further, the client can also be decomposed into static pages and page interaction two parts.3). Reduce server pressureThe server only uses the data to be able, does not have the tube to display the logic and the page synthesis, the throughput ability will increase several times;4). Share a set of back-end program codeWithout modifying the backen

expansion of C/sAs mentioned above, the C/s and B + can carry out the same business processing, but with the rise of the Internet technology, b/s structure is an improvement or expansion of the structure. The following advantages are provided with respect to C/S,B/S:1, Distribution: can be at any time to inquire, browse and other business2, Business expansion convenience: Add Web page can increase server function3, maintenance is simple and convenient: Change the webpage, can realize all users

Describes how to use mysql to create an index and its advantages and disadvantages. Preface Index is a data structure that helps MySQL efficiently obtain data. It is critical for high performance, but people often forget or misunderstand it. The more data the index is, the more important the index is. Databases with small sizes and low loads can have good performance even if they do not have indexes. However, when data increases, the performance decre