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on the needs of the site.Nineth StageData read-write separation and inexpensive storage schemeSuddenly 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 r

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

own cache modules and methods, PHP has pear cache module, Java more,. NET is not very familiar with, I believe there is certainly.5. MirrorMirroring is often used by large web sites to improve performance and data security, the mirror technology can solve the different network access providers and geographical user access speed differences, such as the difference between chinanet and edunet prompted a lot of websites in the education network to build mirror site, Data is scheduled to be updated

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

to buy hardware load, such as F5, Netsclar, Athelon and so on, If the funds are not allowed, the plan is to make the application logically classified, and then dispersed to different soft load cluster;2, some of the original state information synchronization, file sharing and other programs may be bottlenecks, need to be improved, perhaps this time will be based on the situation to write to meet the needs of the Web site Distributed file system, etc.After doing this, we begin to enter an era of

Storage Management:Here we are going to learn about two types of disk arrays:The disk array is made up of many inexpensive disks , combined into a large-capacity disk group, the use of individual disks to provide data generated by the bonus effect to improve the overall disk system performance. Using this technique, the data is cut into many sections, which are stored on each hard drive. First, RAIDWhat 1.RAID is:Raid:redundant Arrays of

Raid:redundant Arrays of Inexpensive Disks, with "Redundant Array of Inexpensive disks" means. Abbreviated disk array.The disk array is made up of a lot less expensive Disk , combined into a large-capacity disk group, the use of individual disks to provide data generated by the bonus effect to improve the overall disk system performance. Using this technique, the data is cut into many sections, which are st

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

.png "/>650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M02/87/C3/wKioL1fhBu3gfbgXAAAuSBv4yBY074.png "style=" float: none; "title=" 1.3.png "alt=" Wkiol1fhbu3gfbgxaaausbv4yby074.png "/>2, create a swap partition of size 1G, and create a good file system, and enable it;650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M00/87/C6/wKiom1fhBymhbrNiAABfEdf7Jzw232.png "style=" float: none; "title=" 2.0.png "alt=" Wkiom1fhbymhbrniaabfedf7jzw232.png "/>650) this.width=650; "src=" Http://s5.51

　　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

also provides directory service tools, the usability needs to be improved ." The following is a summary by a management consultant. Its customers need to manage 50-desktops: "Ubuntu won't succeed in the Enterprise until there are active directories, Exchange and Outlook competitors ." In the battle against Attachmate for Novell, Canonical eventually broke down. Novell has many excellent products, such as eDirectory and GroupWise, that can work with Ubuntu. The Linux advantage of Canonical, coup

United States is fragmented, and many patents are meaningless, but u. S. Patent and Trademark Office officials are reluctant to say no to them, the reason is that the company applying for a patent upon rejection will submit an application again after slight modification, bringing them more work burden. Enterprises like to apply for vague and broad-range patents, because they can apply them to situations that are not originally appropriate-that is, litigation. Linus said that patent licensing o

This is a creation in Article, where the information may have evolved or changed. Brief introductionSince the use of Chromebook, my mind has been flooded with the idea of developing in the cloud. I'm only happy with Cloud 9 in an online development environment where I've used a few bits. In fact, Cloud 9 doesn't support go development, so I'll teach you how to get go running on Cloud 9.Create your workspaceThe first step is to create a worksp