why virtualize servers

The emergence of cluster technology and the rapid development of IA architecture servers provide new choices for social needs. It is cost-effective, easy to use and maintain, and cluster technology can be used to construct a supercomputer. Its super processing capability can replace the expensive large-scale computer, it has opened up a new direction for high-end applications in the industry.Cluster technology is a relatively new technology. With clus

soon to graduate, but also to start looking for a job, the university wrote so many code, but not a good summary of the commonly used concept is a pity amount, through this blog record my most commonly used knowledge of the good. When it comes to Web servers, there are a lot of articles are introduced very well, before I saw a very good, to my help is very big, but now can not find the original text, see the blog is reproduced in the park, I am here a

The website has 0.56 billion PVS per month, but only 25 servers are used.The Q A community network StackExchange consists of more than 100 websites, including StackOverflow, which is ranked 54th by Alexa. StackExchang has 4 million users, with a monthly PV of 0.56 billion million,However, only 25 servers are used.And the CPU load is not high. It does not use cloud computing, because cloud computing may slo

phpmyadmina4689f Then execute the CD phpmyadmina4689f into the installation directory, the latest version of the phpMyAdmin support fast configuration, do not have to execute the installation script, the official rapid installation of Chinese documents: http://docs.phpmyadmin.net/zh_CN/ Latest/setup.html#quick-installAt this point you can see a configuration file under the directory: config.sample.inc.phpMake a copy of this file:CP config.sample.inc.php config.inc.phpThen perform the edit:Vim c

Server Design technology has many, according to the protocol used to divide the TCP server and UDP server. The loop server and the concurrent server are divided by processing mode.1 loop server and concurrent server modelIn the network program, in general, many customers correspond to a server, in order to deal with customer requests, the service side of the program has put forward special requirements.Currently the most commonly used server models are:• Loop server: The server can only respond

Web project deployment to Tomcat in addition to the Eclipse plugin, Eclipse also has a servers window to deploy. Issue background: Servers window, I previously created a tomcat v6.0 Server, then I deleted the auto-generated project servers, and changed the tomcat path configuration in eclipse (because I deployed it with the configuration file server.xml). The pro

This paper briefly introduces how to extend the console of Linux server through the common COM port, which is practical and simple, not limited by the server network, and can easily manage the Linux server in the actual production environment. When it comes to managing Linux servers, there are many different ways to do this: Keyboard + monitor, Web Landing, web-based tools, graphics tools under X system, and so on, which is not a problem on a regular

In this article, I'll introduce you to the communication ports used by various Exchange servers (ExchangeServer) components of Microsoft's development, so that you know which ports can be shut down and which ones must remain open for better security. Exchange Systems Services (Exchange System Attendant) Exchange System Attendant is one of the most difficult to plan Exchange components, primarily using inbound TCP135 ports, and also using some random p

Web|web Service |web Server | security | Attack Run Nmap Search the entire network can list all known servers within the domain. In addition, you can view DNS to see what the server administrator has set for this domain. Then use the previous Example.server field: # nslookup The command "set Type=ns" (name server) tells Nslookup to find only the name server information for the domain, so this example queries "Www.example.serve

Source: SQL Server linked server securityI. What is covered in this article (Contents) What is covered in this article (Contents) Background (contexts) Safety settings (Security Settings) Achieve the effect: User A can see can be used, B users can not see this linked server; Realization effect: User A can see can use, B user can see but no permission to use; Summarize References (References) two. Background (contexts)when it is necessary to

Tags: server virtualization NLB SQL High AvailabilityI. Background of the projectThe company has 5 servers hosted in the ISP Center, of which 3 dell720,2 DELL910, escrow fee is 78,000 yuan/year. The load on each server is very low, and the company has a mandatory copyright requirement for the software and does not allow the use of pirated software. VMware5.5 version, each physical host only allow 1 CPU free to use, the newly released VMware6.0 cancele

First, we must understand what a PC server is? The so-called PC Server is an Intel-based server. Unlike some large servers, such as mainframe and UNIX-based servers, most of them run Windows or Linux operating systems and are generally used, the latter is mostly for professional purposes, such as banking, large manufacturing, logistics, securities... In other industries, the average person has little chance

Summary Sometimes Apache is everywhere, and everyone is running Apache, and even the dogs including Apache are running their own Apache. But even so, there are still many other types of Web servers to choose from. This article provides a comprehensive comparison of mainstream Web servers on the market. Apache is everywhere and can run on multiple system platforms, including Linux and Soloris. Apache is the

Five Measures to Ensure the Apache security of Web servers-Linux Enterprise applications-Linux server application information. For details, refer to the following section. Source: Saidi net Author: freedom Needless to say, an important reason for Apache to take over half of Web servers is that it can provide a secure Web operation environment. The Apache community has done a lot of work to ensure its secur

Basic Security reinforcement for Windows ServersMeituan cloud (MOS) provides cloud host servers for Windows Server 2008 R2 and Windows Server 2012 R2 data centers. Due to the high market share of Windows servers, there are a large number of malware such as viruses and Trojans targeting Windows servers, which are easy to obtain and have a low technical threshold.

Security is more important than anything else. Your company must have run important functions or saved important confidential files on Windows servers. How can we ensure their security? So don't put the data in a relaxed state of security measures. This article recommends 10 tips to improve the security of Windows OS servers. 1. log out-- It is best to leave the system for a server that is not frequently u

Analysis: event records of one intrusion into Linux servers This vulnerability is common in ColdFusion and content management systems. In some cases, a specific attack may succeed, and a high-value server may cause significant data leakage. In other cases, attackers can operate infected hosts on a large scale. Recently, I noticed that multiple IP addresses were attempting to exploit a PHP vulnerability, So I recorded the results using a honeypot. Thi

Recently, I learned the expect scripting language through mongoingshortct books. This scripting language is an extension of the tcl language and is used to solve the problem that some tools cannot automatically interact with each other. For example, when logging on to ssh, you cannot specify a password in the command. The following is a simple example of managing multiple servers using reverse CT: 1 Recently, I learned the wide CT scripting language t

kernel is run. However, the more CPUs are installed, the fewer performance improvements are obtained from hyper-threading. In addition, the Linux kernel recognizes multi-core processors as multiple separate CPUs. For example, two 4-core CPUs are treated as eight single-core CPUs in the Lnux system. however, from the performance perspective, the two 4-core CPUs and eight single-core CPUs are not exactly equivalent. According to the test conclusion, the overall performance of the former is 25% ~

For most modern enterprises, data security is equally important as physical security. Think about all the important business information, intellectual property rights and customer data stored on the server. You will not leave the materials on your desk without locking the door. Therefore, you cannot store the data on your server, but do not take adequate security measures. Most of us know how to use firewall and anti-virus software to protect our computers. However, we may not know how to fully