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Original: http://hadoop.apache.org/core/docs/current/hdfs_design.html Introduction Hadoop Distributed File System (HDFS) is designed to be suitable for running in general hardware (commodity hardware) on the Distributed File system. It has a lot in common with existing Distributed file systems. At the same time, it is obvious that it differs from other distributed file systems. HDFs is a highly fault tolerant system suitable for deployment in cheap ...

1. The introduction of the Hadoop Distributed File System (HDFS) is a distributed file system designed to be used on common hardware devices. It has many similarities to existing distributed file systems, but it is quite different from these file systems. HDFS is highly fault-tolerant and is designed to be deployed on inexpensive hardware. HDFS provides high throughput for application data and applies to large dataset applications. HDFs opens up some POSIX-required interfaces that allow streaming access to file system data. HDFS was originally for AP ...

Intermediary trading http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall as the saying goes: Understand the technology is not necessarily understand SEO, understand the indefinite knowledge of SEO technology, but for the webmaster, Must choose to know the most basic technology, do not require the understanding of advanced language, but the basic search engine protocols need to know. Communicate with the webmaster when found that many webmasters can not grasp the right search agreement, special ...

I believe you webmaster are dynamic CMS Station, then, the site root directory should have a template template folder, if you do not want to let search engines Crawl template Template folder under the template file, then write robots.txt file should pay attention to a point: (very main) example one: " Disallow:/template "means that/help.html and/template/index.html do not allow search engine spiders to crawl. Example two: "D ...

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The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall one, the website log file where? "Simple said Web site Virtual host FTP several folder description" after the successful virtual host, will be in your FTP automatically generated 4 folders, respectively: "Databases", "Logofiles", "others", "wwwroot", they function as follows: ...

What is a robots file? Search engine through a program robot (also known as Spider), automatic access to Web pages on the Internet and get web information. You can create a plain text file robots.txt in your Web site, in which you declare the part of the site that you do not want to be robot, so that some or all of the content of the site is not included in the search engine, or the specified search engine contains only the specified content. Where are the robots.txt files? robots.txt files should be placed in the site root directory ...

This is a UI template specification, B / S version of the application is more applicable, in fact, such a thing is not what the formal norms, just to adapt to the development environment we are now facing and organizational processes to make some expeditious efforts , And to solve some problems with the program communication and interface, try to avoid misunderstanding and friction. First, the applicable environment and object Second, the necessity Third, the technical principles Fourth, the code writing norms Fifth, the page template specification First, the applicable environment and objects This specification applies to browser-based B / S version of the software project development. Template development process template page writing and template files apply ...

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The intermediary transaction SEO diagnoses Taobao guest Cloud host Technology Hall website completes, the maintenance and the management becomes the work which needs to carry on continuously. 　　In this chapter, the site will be optimized for internal links, efficient maintenance, PR upgrade way to introduce. First, optimize the internal links of the site two, the site efficient maintenance of three common sense three, improve the site PageRank have a coup four, site exchange links to beware of counterfeit five, against the vulgar ban on the site's illegal content six, simple configuration let Web server impregnable ...