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and inexpensive storage solutionsSuddenly one day, found that the perfect time to end, the database of the nightmare once again appeared in the eyes. Due to the addition of too many webserver, resulting in the database connection resources is not enough, and this time has been divided into a table, and began to analyze the pressure of the database, you may find the database read and write ratio is very high, this time often think of data read and wri

continues to grow, and the requirements for system availability are increasing, this time requires a deeper understanding of the technologies used and the need for more customized products based on the needs of the site.Architecture Evolution Step nineth: Data read-write separation and inexpensive storage solutionsSuddenly one day, found this perfect era also to end, the database nightmare again appeared in the eyes, because of the addition of webser

Some time ago, I was asked what was cloud computing, and I explained it with some of my own ideas and some of the concepts I had accumulated, but I didn't feel very thorough about myself.Today, we specifically looked for some relevant information, summarized as follows:The concept of cloud computing:Professor Liu Peng Two definitions of the length of cloud computing.The long definition is: "cloud computing is a business computing model. It distributes computational tasks across a large pool of c

First beta developer kit now availableDevelopers can now take advantage of. net micro framework with Microsoft's release of a broad beta developer kit. microsoft has used the platform with several projects internally. with this kit, outside developers and Microsoft partners have the opportunity to build applications on the smallest of devices. to view the full news release click here. The Microsoft. NET micro framework brings a full-featured managed code environment to smaller,Less expe

data storage requirements, it is unthinkable. Because of this, a new technology--raid was born.Redundant array of independent hard disks (RAID, redundant array of independent Disks), formerly redundant Array of inexpensive disks (redundant array of inexpensive Disks), referred to as hard disk array.The basic idea is to combine a number of relatively inexpensive

Often someone communications raid, but it does not know its so dye, today I will be an example of Internet cafes to explain.With the expansion of Internet cafes, internet cafes will increase the number of computers, Internet users also increased, the speed of data access to the server will become a new bottleneck, many customers began to complain about the server on-demand film comparison card, game upgrade slow and other issues, if not to take relevant measures, Then the business will be destro

RAID level features, refer to Wikipedia.Redundant array of independent hard disks (RAID, Redundant array of independent Disks), formerly redundant Array of Inexpensive disks (Redundant array of inexpensive Disks), referred to as disk arrays. The basic idea is to combine a number of relatively inexpensive hard drives into a hard disk array to achieve even more exp

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　　The disk array (redundant Arrays of inexpensive disks,raid) has the meaning of "inexpensive and redundant disk arrays". the principle is to use array method to do disk group, with the design of data distributed arrangement, improve the security of data. The disk array is made up of many inexpensive, small, stable, slow disks, combined into a large disk group, a

RAID: Redundant array of independent disks. In the early days it was called the redundant Arrays of inexpensive disks, a "cheap Redundant array of disks"; it turned out that the inexpensive effect of such a device was really high. Therefore, change ' inexpensive ' to ' independent ', what we now call "independent redundant disk array". Redundant array of indepe

This is a creation in Article, where the information may have evolved or changed. Go language Programming: Collection types Go Collection This chapter mainly describes the following types: The value, the pointer, and the type of the reference. In addition, there are some built-in types for the Go language: arrays, slices, and mappings. Typically, the variable holds the corresponding value. Values are copied once when passed to a function or method, which is very

This is a creation in Article, where the information may have evolved or changed. Go language Programming: Collection types Go Collection This chapter mainly describes the following types: The value, the pointer, and the type of the reference. In addition, there are some built-in types for the Go language: arrays, slices, and mappings. Typically, the variable holds the corresponding value. Values are copied once when passed to a function or method, which is very

webserver.The evolution of Architecture six read-write separation and inexpensive storage solutionsBy increasing the Web server to enjoy a quick access to the happiness, found that the system began to slow down, after looking, found that the database write, update some of these operations of the database connection resource competition is very fierce, causing the system to slow down, how to do, read and write separation, subscription and releaseCheap

loss than RAID 5, so "write performance" is very poor. 　　Poor performance and complex implementations allow RAID 6 to be rarely used in practice. RAID 7: This is a new RAID standard, with its own intelligent real-time operating system and software tools for storage management, can be completely independent of the host running, do not occupy the host CPU resources. RAID 7 can be seen as a storage computer (Storage computer), which differs significantly from other RAID standards. In addition to t

-node pressure is distributed through the load balance to multiple nodes, improve the system load capacity, but also improve the stability. 2, Reverse proxy: A large internet site can not introduce the reverse proxy to the static resources processing, servlet containers used to handle static images and text is very extravagant, Apache, Nginx, squid are excellent solutions. 3, the page static: The Internet Application "cache for King", which may be a number of scenarios can bring Whaley most

------------------------ RAID --------------------------------------------------- Introduction:The disk array is short for RAID (Redundant Arrays of Inexpensive [Independent] Disks, RAID), meaning "cheap and Redundant disk Arrays. The principle is to use arrays as disk groups and use them in combination with the Design of Distributed Data arrangement to improve data security. The disk array mainly targets hard disks. in terms of capacity and speed, it

raid Introduction: RAID (Redundant array of independent/inexpensive Disks) is known as a redundant array of independent inexpensive disks. The basic principle of RAID is to combine multiple inexpensive small disks to improve fault tolerance and access speed. RAID level description; :raid Comparison of text ) Commonly used RAID classes are RAID 0, RAID1,

Early due to raid is often used to combine some inexpensive SATA interface hard disk devices to complete redundancy.So the early full name is: redundant array of inexpensive Disks (inexpensive redundant disk array). Today, RAID is also used by most businesses to combine SCSI and SAS interface hard disk devices.So now the full name is:redundant array of independ

Early due to raid is often used to combine some inexpensive SATA interface hard disk devices to complete redundancy.So the early full name is: redundant array of inexpensive Disks (inexpensive redundant disk array). Today, RAID is also used by most businesses to combine SCSI and SAS interface hard disk devices.So now the full name is:redundant array of independ

the underlying details of the distribution. Make full use of the power of the cluster for high-speed operation and storage. Hadoop implements a Distributed File system (Hadoop distributedfile System), referred to as HDFs. HDFs is characterized by high fault tolerance and is designed to be deployed on inexpensive (low-cost) hardware, and it provides high throughput (throughput) to access application data for applications with large datasets (large dat