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implemented at the front end, but the main transaction logic is implemented at the server end. the Browser client, WebApp server, and DB constitute the so-called three-tier architecture. B/S architecture systems do not require special installation, only Web browsers.
In the B/S architecture, the display logic is handed over to the Web browser, and the transaction processing logic is placed on the WebApp. This avoids the huge fat client and reduces the pressure on the client. Because the client
tree can be well extended to large databases, and its size is independent of the size of the database.The disadvantages of the decision tree:In the decision tree, the results of information gain are biased towards those features with more numerical values.Second, the decision tree processing the missing data difficulties.Thirdly, the problem of over-fitting is appearing.Iv. ignore correlations between attributes in the dataset.2
Two structure differences and advantages and disadvantages of C/s and b/s, architecture
I. C/S architecture
1. Concept
C/S architecture is a typical two-tier architecture, the whole process is client/server, that is, the client server-side architecture, the client contains one or more programs running on the user's computer, and the server side has two, one is the database server side, the client through t
The full duplex of a switch means that the switch can receive data while sending data. It cannot directly connect the input/output ports with different rates and is prone to packet loss, in particular, it supports switching between ports at different speeds to ensure collaboration between high-speed ports and low-speed ports.
With the gradual development of network applications, telecom-grade switches, especially layer-3 switches, have become the focu
templates, yes, no, no, supported object-oriented, yes, yes, no, you may have some questions about my language evaluation, please first read my other article
Discrimination based on object and object-oriented programming paradigm and Application in mainstream programming languagesClarify related concepts. I am not very familiar with object-oriented and Object-based and popular definitions.
Advantages and disadvan
: This article mainly introduces (summary) the advantages and disadvantages of NginxLVSHAProxy server load balancer software. For more information about PHP tutorials, see. PS: Nginx/LVS/HAProxy is currently the most widely used three load balancing software. I have implemented these software in multiple projects. I have referenced some materials and combined some of my experience in using it, to sum up.
G
"Abstract" This paper gives a brief description of TCP congestion control algorithms, and points out their advantages and disadvantages, and their applicable environment."Keyword" TCP congestion control algorithm advantages and disadvantages of the application of environmental fairnessFair sexFairness is the ability to
Talk about the advantages and disadvantages of asp,php,jsp http://hi.baidu.com/lhyboy/item/f95bac264c38830d72863e41ASP, PHP, ASP, JSP and other mainstream web development language comparisonToday, an article on the mainstream website development language-"ASP, PHP, ASP. NET, JSP and other mainstream web development language comparison", and everyone together to exchange a variety of mainstream website devel
latency. Therefore, the poor real-time Packet Exchange is not suitable for transmitting real-time or interactive business data.
② Message exchange is only applicable to digital signals.
③ Because there is no limit on the packet length, each intermediate node must completely receive the entire packet. When the output line is not idle, several complete packets may need to be stored for waiting for forwarding, each node in the network must have a large
. LNMP is now also a very popular web environment, and the lamp environment, nginx in dealing with static pages, especially against high concurrency relative to Apache advantages;7, Nginx now as a web reverse acceleration cache more and more mature, faster than the traditional squid server, the need for friends can consider using it as a reverse agent accelerator;Disadvantages of Nginx:1, Nginx does not sup
, there is no need for large-scale site deployment. This use of Nginx or Haproxy is the first choice, at this time these things get started fast, easy to configure, on the seven layer above the use of HTTP protocol can. This is the first choice.The second stage: with the further expansion of network services, then the single-point nginx can not be satisfied, when the use of LVS or commercial array is the first choice, nginx at this time as a LVS or ar
site deployment. This use of Nginx or Haproxy is the first choice, at this time these things get started fast, easy to configure, on the seven layer above the use of HTTP protocol can. This is the first choice.
The second stage: with the further expansion of network services, then the single-point nginx can not be satisfied, when the use of LVS or commercial array is the first choice, nginx at this time as a LVS or array of nodes to use, The specific
not only an excellent Load balancer/reverse proxy software, but also a powerful Web application server. Lnmp is also a very popular Web environment. It is very popular with lamp environments. nginx has advantages over Apache in handling static pages, especially in anti-high concurrency; 7. nginx is now becoming more and more mature as the Web reverse acceleration cache, and its speed is faster than the traditional squid server. If you need it, you ca
server. LNMP is now also a very popular web environment, and the lamp environment, nginx in dealing with static pages, especially against high concurrency relative to Apache advantages;7, Nginx now as a web reverse acceleration cache more and more mature, faster than the traditional squid server, the need for friends can consider using it as a reverse agent accelerator; Disadvantages of Nginx:
1, Nginx do
The most recent internet speculation has been the hottest, and basically now the internet giants have their own open platform. The major search engines, too, have withdrawn from their own open models and standards. This article for you to introduce the current several mainstream commodity search (search engine for E-commerce open to a model). I am engaged in an E-commerce site to promote the site, since the shopping search, the boss asked us to join these search engine products included! So we w
the output is about to reach the specified value, the output feedback voltage from the feedback network is close to the reference voltage value, At this time, the error amplifier to the output feedback voltage and the reference voltage between the small error signal amplification, and then by the adjustment tube amplification to the output, thereby forming a negative feedback, to ensure that the output voltage stability in the specified value, simila
When formatting a disk in Windows, you can see options such as FAT, FAT32, and NTFS in the options of the file system, when formatting a USB flash drive or other mobile storage devices, the exFAT option is displayed. What are the four disk formats and their advantages and disadvantages?
When formatting a disk in Windows, you can see options such as "FAT", "FAT32", and "NTFS" in the options of the file syste
When formatting a disk in Windows, you can see options such as "fat", "FAT32", and "NTFS" in the options of the file system, when formatting a USB flash drive or other mobile storage devices, the "exfat" option is displayed. What do these four disk formats mean and what are their advantages and disadvantages? What should we choose? The following is a detailed introduction.
Before introducing the difference
This year to do video site more and more, especially some new podcast network, disrupted the traditional video site model, the Emergence of podcast network, so that netizens have more free video viewing options, but also for the video search this business lay the foundation. I will now say that I have contacted some of the podcast network, free video
Ideal for small and medium sized projects
Various plug-ins to choose from
A simple and understandable document
You can change the configuration without restarting the server
Disadvantages:
It can be difficult to use the runtime language
Developing multithreaded applications, GORM may cause problems
Complex integration process
Delayed run time 5.Struts 2-java web Framework
The Apache struts is an open source, free MVC framework for developing modern J
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