Linux System Performance Analysis

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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According to IDC's latest report, "China's Linux market 2009-2013 forecast and Analysis," 2008 China's total Linux market revenue reached 23 million U.S. dollars, growth rate of 26%. With the maturity of the technology, for users, Linux as an operating system software, whether the performance or stability are improving.　　Linux manufacturers have also spared no effort to promote the market, so that the Chinese market for Linux acceptance and deployment is increasing. 刘宁蔚, senior analyst at IDC's China Software and Services Research department, said: "200 ...

What is an intensive back-end bare cloud system? The back-end cloud is the one that has removed all the interfaces used for front-end access and deployment, leaving only the cloud of backend virtualization management platform systems. This is further known as the naked cloud because it does not have any front-end modules for visualizing the business. Compared to the cloud front-end system, the back-end bare cloud system is a compact, intensive kernel system responsible for cloud virtualization implementation. For the public cloud, there can be no front-end system, but there must be no back-end system, because the backend is a collection of public cloud system based on Http://www.aliyun.com/zixun/aggregat ...

Security is a huge and challenging subject, but everyone who works on the server side should know the basic steps. Cameron outlines some ways to keep your user account clean and secure. Security is a big problem. It's not going to be the same, and it's hard to know how much it needs to scale: if you're not careful, when your boss really wants to keep the doorman from seeing his annual budget, you finally believe that he needs to understand the benefits of security. No matter how challenging it is to keep up with trends in all aspects of computing security, there are several areas that are already sufficient ...

&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Clusters and Linux cluster solution cluster System (Cluster) mainly solve the following problems: High reliability (HA) using cluster management software, when the primary server failure, the backup server can automatically take over the work of the main server, and timely switch to the past to achieve the user ...

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What kind of virtualization technology to choose for the cloud computing platform will be a problem that cloud computing construction will face. This article compares and analyzes the architecture levels of the four mainstream virtualization technologies.

More and more enterprises are using Hadoop to process large data, but the overall performance of the Hadoop cluster depends on the performance balance between CPU, memory, network and storage. 　　In this article, we will explore how to build a high-performance network for the Hadoop cluster, which is the key to processing analysis of large data. As for Hadoop "Big Data" is a loose set of data, the growing volume of data is forcing companies to manage in a new way. Large data is a large set of structured or unstructured data types ...