cloud advantages and disadvantages

Commonly used EJB, RMI, Web Service, as well as Hessian, NIO, and so on, their advantages and disadvantages compared to the following: 1:ejb Advantages: Good scalability, strong security, support distributed transaction processing. Disadvantage: Can not cross language, configuration is relatively complex, different Java container is difficult to do seamless

to consider JPA alternativesThe version of Java that you use determines whether you can actually apply JPA. JPA is part of the EJB 3.0 specification, which is part of the Java EE 5 version. If you have not updated to Java EE 5, you cannot use JPA.Your application requires services that JPA cannot provide, such 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

Some time ago, although a company's project was maintained a few years ago, it was not a long history, but it was still a few years ago. The three-tier architecture, coupled with the old architecture of stored procedures, was adopted, this architecture is no problem. Most systems do this. However, due to the misuse of the storage process of this system, it is difficult to maintain it in the future, any adjustments involving the database must be made to the stored procedures, Entity classes, SQL

: This article mainly introduces the advantages and disadvantages of Apache and Nginx. For more information about PHP tutorials, see. Http://blog.csdn.net/xifeijian/article/details/17385741 1. Advantages of nginx over apache:Lightweight and web services, which consume less memory and resources than apacheAnti-concurrency: nginx processes requests asynchronously

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 ta

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 futu

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

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 biggest problem in the BS architecture.(4) C and S interaction is a request-response pattern, which usually requires a refresh of the page, which is not a customer's pleasure

the tile. ,,, a frame all the rendering commands after the execution of vertex shader generation triangle, each tile will have a triangle list, this list contains the need to draw inside the tile all triangle. Then the GPU then executes each tile raster and per-fragment based on the Triangle list operationThe advantages of TBR are:There is no need to repeatedly access the frame buffer,depth buffer,stencil buffer when performing raster and per-fragmen

U disk partition format is good or bad, directly affect the file transfer performance, speed and so on. So everyone in the U disk partition, you should carefully choose what type of u disk format. But we do not know which kind of U-disk format is good, which is bad, below we will focus on the 4 most common U disk format: FAT16, FAT32, NTFS, exFAT, and the 4 kinds of U disk format, each of the advantages and disadv