Linux Disk Performance

I. Introduction We often see some similar in the program disassembled code 0 × 32118965 this address, the operating system called linear address, or virtual address. What is the use of virtual address? Virtual address is how to translate into physical memory address? This chapter will give a brief account of this. 1.1 Linux Memory Addressing Overview Modern operating systems are in 32-bit protected mode. Each process can generally address 4G of physical space. But our physical memory is generally hundreds of M, the process can get 4 ...

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For small and medium-sized enterprises, there are many free and open source router and firewall solutions, even as a business choice. 　　Many of these products offer LAN services, such as VPN services, hotspot gateways, and the use of mandatory network portals to share wireless networks. Here, the editors find open source and free router projects that are suitable for businesses that include small businesses, midsize, and even the size of Cisco and Juniper.  Gossip Less, we look at these seven open source and free Linux network operating system. &nb ...

This is the technology that protects data integrity. RAID means redundant low-cost http://www.aliyun.com/zixun/aggregation/20901.html "> Disk array. It is a rather new concept, presented by the University of California, Berkeley, in 1987. The basic idea behind raid is that by using multiple small disks (relatively few large disks) and possibly some checksum data, you should be able to rebuild the data in one of these disk failures instead of missing a few ...

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Devil-linux is a professional Linux security release, primarily for security firewalls, routers, gateways, and servers. The goal is to become a small, 17813.html "> Customizable and Secure Linux system." Its configuration can be saved to a floppy disk or USB disk, and has multiple optional packages. Devil-linux 1.6.0 This release brings several new features, performance improvement and software update kernel 3.2 and 64-bit versions. Software Information: Http://www.devil ...

High-performance Computing (highperformancecomputing) is a branch of computer science, which mainly refers to the research and development of high-performance computers from the aspects of architecture, parallel algorithms and software development. With the rapid development of computer technology, the computational speed of high-performance computers has been increasing, and its standards are also changing. High-performance computing is simply the completion of certain types of technical workloads on 16 or more servers. It doesn't matter if the number is 8, 12 or 16 servers. Under our definition I ...

Gentoo Linux is a special Linux distribution that can be automatically optimized and customized for any application and need. 　　 Gentoo has excellent performance, highly configurable and best-in-class user and http://www.aliyun.com/zixun/aggregation/36661.html "> Development community." As a result of Portage technology, Gentoo Linux can serve as an ideal security server, development platform, professional level desktop ...

You can use Linux's graphical tools to easily monitor your system's network performance. In this article, you will learn how to use the MRTG (SNMP-based, monitoring http://www.aliyun.com/zixun/aggregation/10374.html "> Network traffic tools) and Webalizer (the tool that analyzes the site hit Ratio). Many servers, routers, and firewalls are insured in their object markers (OIDs) that they ...