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Internet As we have ideally, the web is experiencing a painful metamorphosis, show the sharpness of the new economy, changed more and more people's investment, entrepreneurship, management, consumption of traditional thinking and habits, the right

Webmaster Webmaster-related Sites in 07 one O'Clock "phone-in four". Network on the rapid emergence of a number of webmaster-related sites. But Ebb tide, in a fierce competition, now has more firmly formed the "tripod" situation, respectively, for

Song Chenlei (like insects and not insects), members, 2000 contact with the Internet, made a more ideal forum, 2005 cooperation in the business of the rental, to commercial operations, Guangdong, China's customer science and technology IDC

All the optimizer has been very attached to the chain, will not ignore the construction of the chain, usually built on the outside chain spend a long time, not all efforts will have a return, the key is whether the method is correct, the choice of

Recently, I do a lot of web sites in Baidu's rankings fluctuate very much, think that there are some optimization of the site or external chain instability caused. Also from the analysis of a number of reasons, from the relevant peer site to

Advantages and disadvantages of data center Power Supply System Solutions As a protection for the normal operation of the data center, the design and selection of UPS have core significance for the construction of the power supply system of the data center. In the current use of the data center, direct parallel and 2N power supply solutions are the most common. Single-host power supply scheme, Hot Backup series power supply scheme, direct parallel po

a redundancy mechanism, you cannot take it lightly. The best solution is not to create another Redundancy mechanism for the redundancy mechanism. Proper maintenance is enough.=== Let's start talking about the main thing, a task about redundancy ===About WifiIs a child shoe of life's best products. Have you considered the feeling of "electricity?Wifi is important, right? Without it, most people are helpless. What about electricity? If there is no electricity, what else can you do? Even if your m

48 V mains supply technology is the future direction of data centers (1) With the large-scale construction of data centers, users pay more attention to energy costs and efficiency. The future direction of the power supply technology of data centers must be the municipal direct power supply technology, while saving the investment and Site Occupation of traditional UPS equipment and reducing the initial cost, it also reduces the operation cost by reduc

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to normal. But our delicate it equipment, feel the voltage impact of the drastic changes, all abnormal restart!I say this example means: People are not as good as the sky. A complete backup, redundancy plan, some seemingly impossible low-level errors, will lead to the collapse of IT systems. We can see a lot of discussion and articles about how IT systems make hot backups, but in the face of power outages, all caution is wasted. Therefore, power security, which is the basis, is also one of the

iOS training------My C language notes, look forward to communicating with you! #include /*While (condition) {loop Body} operating principle 1. If the initial condition is not established, the loop body will never be executed 2. If the condition is established, the loop body is executed once, the execution is complete, and the condition is determined again ... break directly ends the entire while loop Continu E ends the current loop body and enters the next loop body execution*/intMain () {//1. F

overall lightning protection scheme should be designed. 1) UPS Power Supply System Lightning Protection The UPS uninterrupted power supply equipment in the IDC room is the only important equipment used to provide a stable, reliable and high-quality power environment for all power equipment in the IDC room, in addition, it is the main way for mains supply to input data centers, So we focus on the protection

Turn off the Linux host-Linux Enterprise Application-Linux server application information on the remote end of Windows. The following is a detailed description. This is a requirement of my own company. We need to shut down all the machines in the data center safely before the UPS is insufficient during power failure. Let's talk about how the company solved the problem. Previously, the company purchased advanced

log query and analysis (Logsearch, log retrieval) Loghub is the core function of the log service, which connects the log source with the log consumer through a unified data model. The biggest advantage is the data pipeline, standardization. The pipeline is large capacity, high reliability, and flexible telescopic, users do not care about the amount of data, how to connect the top issues, you can directly use. Loghub has 10+ Language SDK, provides agents and supports Third-party agents, syslog,

0. Benefits of dynamic Upstream Openresty author, recently also open source (not open source when I write this article) they have used the Balancer-by-lua feature, progress issues. Can dynamically modify the upstream, using reverse proxy proxy_pass, to the back-end process or machine: dynamic load balancing control; smooth up and down service, upgrade service; High possible guarantee – Auto kick offline service downline; 1. First, the principle Ideas for reference from 2 directly on the confi

structure to facilitate user expansion based on actual conditions. In addition, InfraStruXure is not a simple UPS. In addition to UPS, it also includes cabinets, Distribution Unit PDUS), environmental detection equipment, power and data cable integrated wiring system design, and other basic components. After purchasing InfraStruXure, the data center does not need to consider the power supply and Integrated

voltage will also occur when the intermittent, power suddenly high and low (voltage is low, such as less than 150V, or too high, such as higher than 260V) of the instability problem, And because the power supply is often unstable will result in LAN routers, switches, servers and other types of equipment can not be continuously normal work, light has affected the quality of the Internet, so long as it will greatly shorten the life of the equipment. Therefore, to ensure the "health" of network eq

......; Beijing Netcom's ADSL equipment experienced a large-scale fault; Chongqing Telecom's server suddenly "paralyzed"; all of these are heat-induced disasters, which also led to a big discussion of data center construction. In the past, the design of heat insulation and ventilation was neglected in the construction of data centers, and a large amount of electricity was wasted. Two years ago, the reporter visited the Institute of Eastern geophysical Corporation of China Petroleum Group. Many

problem, not to mention the supply process due to the lack of voltage will also occur when the intermittent, the power is high and low (voltage is low, such as less than 150V, or too high, such as higher than 260V) The instability of doubt, And because the power supply is often unstable will lead to the LAN routers, switches, servers and other types of equipment can not be continuously normal work, light affects the quality of the Internet, long-term so will greatly shorten the life of the equi

UPS's Chinese meaning is "uninterruptible power supply", is the abbreviation of English "Uninterruptiblepowersystem/uninterruptiblepowersupply", It can ensure that the computer system continues to work for a period of time after a power outage so that users can save the emergency disk, so that users do not affect the work or loss of data due to power outages. That is, uninterruptible power supply, is the battery (much for lead-acid maintenance-free battery) and the host connection, through th