high end server

Recently, some netizens asked in the Forum: "low-end routers and high-end routers are similar in usage. Why is the price so far different ?" In fact, this question is very good, and many friends who are not familiar with the product and technology will basically have similar questions-"Why is this router so expensive with the same functions, another one is so che

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At present, the routing technology is developing rapidly, and the performance of routers is getting higher and higher. "low-end routers and high-end routers are similar in usage. Why is the price so far apart ?" In fact, this question is very good, and many friends who are not familiar with the product and technology will basically have similar questions-"Why is

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1. Quirks mode and DTDStandard mode: Browser according to specification performance pageQuirks mode: Simulates old browser behavior to prevent old sites from working (in order to be compatible with old-fashioned browser code), Firefox will parse the Web page according to standard mode if it is omitted to write the DTD (document type definition) statement, but it will trigger the weird mode in IE.The difference between the two models is relatively large, the typical is the analysis of the box mod

High-performance Server ArchitectureHigh-Performance Server architectureSource: http://pl.atyp.us/content/tech/servers.htmlSource: http://www.lupaworld.com/home/space-341888-do-blog-id-136718.html(Map Note: I read again, "In my Heart Has Obsession Yan", translation is also very good, so tidy up a bit, re-release, Memo)IntroductionThis article will share with you

of the page. 1.4 final kernel page table When Ram is greater than 40 96 MB For modern computers, especially some high-performance servers with a memory of more than 4 GB, how can we initialize the kernel page table? To be more precise, we can handle the following situations:• The CPU mode supports physical address expansion (PAE)• Ram capacity greater than 4 GB• The kernel is compiled with PAE support Although PAE processes 36-bit physical addresses

Chapter 8 high-performance Server programming in Linux (high-performance server program framework)8. High-performance server program frameworkThe server is reconstructed into three main

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High-end memory refers to memory with a physical address greater than 896M. For such memory, it is not possible to map in "Kernel Direct mapping Space".Why?Because "kernel direct mapping Space" can only be from 3G to 4G, only directly mapped 1G physical memory, for more than 1G of physical memory, powerless .In fact, "kernel direct mapping Space" also does not reach 1G, but also to leave a bit of linear spa

GJM: [C # High-performance server] High-Performance Socket server with port and heartbeat [reprinted], Thank you for reading this article. If you like it and can use it, please let me recommend it! Your spiritual support is a strong motivation for bloggers to write and repost collections. Reprinted

choice of aviation Ka brand side-through power supply and 450W rated high-power power supply, because the next generation of graphics card power consumption is not high, 450W high-power brand power can also be very good to meet the needs of the machine power supply. Of course, if you consider later upgrades, the power supply can also choose a larger number.

Linux operating system and drivers run in kernel space, applications run in user space, both cannot simply use pointers to pass data, because Linux uses a virtual memory mechanism, user-space data may be swapped out, and when kernel space uses user-space pointers, The corresponding data may not be in memory. Linux Kernel address mapping modelThe x86 CPU uses a Segment-page address mapping model. The address in the process code is a logical address, and after a segment-page address mapping, the p

Build high performanceASP. NETOne site Analyze the page processing process (front-end) InASP. NETWhen optimizing websitesASP. NETThat's enough. In the process of optimization, we usually first find out where the problem may exist, and then prove that the problem is to be solved. After confirmation, we will take some measures. SeriesArticleThe structure is as follows: first introduce the front-

a redundant connection, that is, creating multiple connections between the core switch and the backbone switch, and between the switch and the server. High-end switch cascade EtherChannel EtherChannel and Port Trunking multi-trunk redundant connections) technology. multiple ports on the switch are physically connected and logically bundled to form a Port with a

corresponding details page, Baidu mobile phone assistant and Sogou mobile phone assistant simultaneously access the local loopback address, and the pea pod calls the custom protocol by the system calls the related application (usually is the pea pod). high-speed download principle pea pod is not implemented in the application has been installed in the context of calling the client to download, when clicking on the download, the query is to download

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turn from:Linux user space and kernel space (understanding high-end memory) Reference: 1. process kernel stack, user stack2. -linux kernel space 3.Linux Kernel Learning notes-5 memory managementLinux operating system and drivers run in kernel space, applications run in user space, both cannot simply use pointers to pass data, because Linux uses a virtual memory mechanism, user-space data may be swapped out,