disk access

This section describes how to speed up PHP applications. We all know that fast speed is the biggest advantage of PHP. In general, PHP always has enough speed to support dynamic generation of Web content. many times you cannot even find a way faster

Main content: (Note summary-it will be supplemented and modified from time to time. if any error occurs, please refer to the discussion) i. RAID description II. mdadm tool introduction III. basic process for creating a RAID IV. disk array management

Describes how to use mysql Performance query. Everything comes from an experiment. See the following example: Table: Copy the code: CREATETABLEIFNOTEXISTS 'foo' ('A' int (10) unsignedNOTNULLAUTO_INCREMENT, 'B' int (10) u everything comes from an

Why is B + tree used? Simply put, it is because the files are large and cannot be fully stored in the memory. Therefore, it is necessary to store the files to the disk. Application of B + tree in database { Why is B + tree used? The reason is: 1.

MySQL index principle overview and slow query optimization practices MySQL has become the preferred relational database for most Internet companies thanks to its outstanding performance, low cost, and rich resources. Although the performance is

Article title: FreeBSD6.0 has been officially released. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. The

One of the advantages of PHP is that it is fast. it is enough for general website applications. However, if the site's traffic is high, bandwidth is narrow, or other factors cause a performance bottleneck on the server, you may have to think of

Article title: Linux solution: Concepts and usage of Modules. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 　

Tracking high I/O waits in linux systems to track the performance of large-scale distributed systems, which is essentially complex. Why is the application slow? What are the bottlenecks? In my experience, one of the major culprit is high IO wait

Article title: Shell from the basics: Chapter 3 run commands in the background. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems,

In the process of eliminating computer viruses, some computer viruses are caused by computer hardware or software faults, and some virus outbreaks are similar to hardware or software faults, such as Boot viruses. This causes a lot of trouble for

Hi. baidu. comlzpskyitem70b944dffe4a9e16e1f46f27 index is used to query data more quickly. There are many query algorithms and a large number of corresponding data structures. Generally, the index data structure of databases is B + Tree. 1. The

Comparison and Analysis of vmware and virtualbox testing process: Dual-system xp and ubuntu are installed on the local machine; two virtual machines are installed on each system; each virtual machine virtualizes a Windows 2003 operating system and

Network management software not only has vulnerabilities, but they are not impeccable. Some vulnerabilities make them useless. Now let's take a look at the critical injury of the network management software. Meiping is very injured. Cause of injury:

about the direct connection of storage space technology, in my previous Blog Small and medium introduction, which is only about this distributed storage implementation of a small amount of extension, here this technology on my superficial research

In a large database, performance has become one of the focuses of attention. How to Make the efficient and effective operation of the database become an issue that must be considered by database administrators and developers."Good

The core architecture of Informix Dynamic servers is designed to provide built-in multi-clue and parallel processing capabilities.Multi-clue On the database server, the Informix dynamic server uses an adjustable database server process pool called a

In a large database, performance has become one of the focuses of attention. How to Make the efficient and effective operation of the database become an issue that must be considered by database administrators and developers. Performance is the

Overview Clever planning is the basis for implementing the relational database management system (RDBMS. It is the only way to meet the requirements for more storage capacity and faster information retrieval. To get the most out of Microsoft SQL

Analysis of the Reason Why Hadoop is not suitable for processing Real-time Data1. Overview Hadoop has been recognized as the undisputed king in the big data analysis field. It focuses on batch processing. This model is sufficient for many cases (for