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Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall Although the Linux system is higher than Windows security, However, some simple security configuration is also necessary. There are a lot of tools on the Internet to scan your admin password with a dictionary, we can create some trouble and increase the possibility of being deciphered. Look at the entry level security configuration ...

Intermediary transaction SEO diagnosis Taobao guest Cloud host technology Hall because of the popular search engine, web crawler has become a very popular network technology, in addition to doing search Google,yahoo, Microsoft, Baidu, almost every large portal site has its own search engine, big and small call out the name of dozens of species, 　　There are a variety of unknown thousands of tens of thousands of, for a content-driven Web site, by the patronage of web crawler is inevitable. Some intelligent search engine crawler Crawl frequency is more reasonable, to the website resource consumption ...

Refer to Hadoop_hdfs system dual-machine hot standby scheme. PDF, after the test has been added to the two-machine hot backup scheme for Hadoopnamenode 1, foreword currently hadoop-0.20.2 does not provide a backup of name node, just provides a secondary node, although it is somewhat able to guarantee a backup of name node, when the machine where name node resides ...

Although Linux is more secure than Windows, some simple security configurations are necessary. There are a lot of tools on the Internet to scan your admin password with a dictionary, we can create some trouble and increase the possibility of being deciphered. Take a look at the entry level security configuration. First: Remote management port modifies SSH's landing port, and the default port is 22. Scan Dictionary Poor lift password They all start with the default. If you change the port to a 4-digit number, it greatly increases their difficulty and time. Edit SSH configuration with vi command ...

In this article, we look at the most common use cases for setting up a high-availability (HA) and load-balanced environment: Load balancing enables you to http://www.aliyun.com/zixun/aggregation/13999.html "> Workloads are dispersed across multiple instances, increasing throughput and achieving redundancy. Use case: Load level across two WEB servers running Apache HTTP Server or IBM HTTP server ...

Preface Having been in contact with Hadoop for two years, I encountered a lot of problems during that time, including both classic NameNode and JobTracker memory overflow problems, as well as HDFS small file storage issues, both task scheduling and MapReduce performance issues. Some problems are Hadoop's own shortcomings (short board), while others are not used properly. In the process of solving the problem, sometimes need to turn the source code, and sometimes to colleagues, friends, encounter ...

Speaking of elastic calculations, no one doubts that Amazon EC2 (elastic Compute Cloud) is the industry leader: Amazon builds its own resilient computing cloud on a platform of large-scale cluster computing within the company, The user can use the Flexible Computing cloud network interface to operate in the cloud computing platform to run each instance (Instance), and the payment method is determined by the user's usage, that is, users only need to use for their own computing platform to pay for the case, after the end of the billing also ended. It can be seen that ...

Compared with Vm,docker, it has obvious advantages in light weight, configuration complexity and resource utilization. With the maturing of Docker technology, more and more enterprises begin to consider improving their IT system through Docker. This article enumerates some Docker practical application scenes, in order to be able to play the role of the trigger, to help us to use Docker more conveniently. Applications packaged with packages made of RPM, gems, and so on may be clear, each package depends on which version of the library, often need to be explicitly written in ...

Back-end development work related to big data for more than a year, with the development of the Hadoop community, and constantly trying new things, this article focuses on the next Ambari, the new http://www.aliyun.com/zixun/aggregation/ 　　14417.html ">apache project, designed to facilitate rapid configuration and deployment of Hadoop ecosystem-related components of the environment, and provide maintenance and monitoring capabilities. As a novice, I ...