Tag Archive: computers

Joomla

Caching of data can help you speed up the site while reducing the load on the primary database server. There are three options for the Joomla global settings to control the caching. In this article we will tell you about general principle of caching mechanisms and present some significant examples, which are directed to choose the optimum time to cache. – The principle of caching when the first claim to the material or the module is saved as soon as all the data you have selected a specific files that are located mostly in the directory cache. Such a mechanism can guarantee you that the file names will never be able to cross with existing ones. Besides that, these files are cached objects as it contains additional information about this unique zakenirovannom object. The next time, the manager checks whether there is such an object under the same parameters.

For example, name, content, date of document creation and data modification. If that is not found, means any material change, or have not received yet keshirovku. If you are requesting an object and it does not exist in the cache, the user before displaying the data, they will be placed in the cache. But if such data from the cache already exists, then the program will check the creation date, creation time. If date and time will vary on a large interval, more than the lifetime of the cache, the object would have to cache again. The advantages of long-cache was found that the lifetime of the cache is approximately equal to 900 seconds or 15 minutes.

USB Flash Drive

To the data rate was satisfactory, note that the interface model has been chosen-USB 2.0. Usually the cost of flash drives is directly linked to the speed of reading and writing. Also, do not be lazy to learn the results of tests on flash cards of various technical sites. For some customers the importance of design has acquired stick. Here it is all about taste. However, if you want to connect a flash drive to the laptop, it may happen that a large flash drive just is not suitable for closely spaced USB-connectors. A little flash drive is also somewhat inconvenient to use.

There are two variants of the traditional flash cards – with a cap and with a retractable USB-plug. The cap can be lost, so easy to use USB Flash cord, and in the second – break down joint. But nothing in the eternal this world anyway. Most often, the stick body is made of plastic. However, there are metal, wood and even rubberized, water resistant variants. If you are looking for a flash drive is not for myself, but as a gift – manufacturers offer gift, nicely decorated versions. A great gift for those who love puzzles – USB Flash-cube Rubik, and for those who appreciate the aesthetic appearance, USB Flash range of different colors will delight them.

The more expensive the flash drive, the higher the degree of protection against copy. Expensive option is to choose those who need to keep information out of reach of prying eyes form. Some flash drives are equipped with a bootable module. With them, you can install programs, such as such – as on Windows. In today's market there are USB Flash Drive technology U3. These options are divided into 2 disks. In the first data, and the second – can be stored and run customized programs. With these flash drives you can work on any computer using only your software. The most important disadvantage is the limited life of USB Flash drives. Usually it is about 5 years, rarely up to 10. out of standing is related to limited number of writes information to a USB Flash drive.

Windows Server

The widespread use and development of computer technology in various fields of human production produced the large number of new trades and professions. This programmers, web designers, animators computer graphics, 3D models, developers, specialists in computer music writing, and many others. All these people in their professional use of such modern tools computer. However, as well as any technical device, the computer must maintain, update and customize. It is in these cases all look back on another specialty – the system administrator. People in this profession can be found in any organization or institution.

Their responsibilities include: installation and maintenance of the operating system on users' computers and servers, computer maintenance and diagnostics, "iron" and peripherals organization of local computer networks and Internet access, in addition, they engaged in the protection of the perimeter of their networks from virus attacks and malicious actions. The system administrator should know how to work with operating systems like Windows NT/2000/XP/Vista/7 and server versions of Windows Server 2000/2003/2008, with various modifications of Linux and BSD. This person should understand and to configure network equipment: Cisco, 3COM, DLink, Zyxel. For most users, system administrator (ie so abbreviated to the system administrator) is "a magician and magician and keyboard myshy." It will help deal with their difficulties and be able to make "all the work." It is for these people, and was coined site Notes administartora system. He is in blog format, which publishes articles about new products in the IT sector, about setting up specific programs and operating systems, and also describes various problems that may stand in front of system administrator in the process, and their solutions. Blog is a professional system administrator with experience in this industry for over 10 years.

Laptop Accessories

In our mobile age where everything is changing fast, portable computers (laptop, notebook) is gradually becoming an attribute of any person. After all, you can use them to stay abreast of all the news anywhere in the world, communicate with family, friends, colleagues, being very far away. The advantages of mobile computers very much. But is it perfect? Every modern notebook is equipped with a touch panel (touch pad) to control cursor in different programs. Still, we recommend that, when given the opportunity and the laptop is on the table and work with the mouse.

Here are a few reasons for this: Let us examine them in detail. The reason for ergonomic – mouse when working with reduced voltage on the wrist, since the manipulator has a special hull form, which makes work more comfortable. The reason for the economic – sensory panel, touch pad notebook (netbook) is a node in a mobile computer, and an output node failure can cause costly repairs, which will definitely be more expensive than buying a new mouse. The reason technology – modern mouse much more sophisticated than the touch pad even the most advanced notebook computer. Resolution, additional buttons, sensitivity – this is not a complete list of parameters on which the mouse is left far behind sensory panels of laptop computers.

So, we have determined that the mouse is a necessary accessory for even the mobile computer. What criteria it should meet, so that buying it, you realize that money is spent not in vain? We formulate important, in our opinion, the factors – the mouse should be: compact, lightweight, strong, to fit in a pocket laptop bags, not to be broken on the road, in transit, to allow work in confined spaces conditions – when the workplace and at least mestaudobnoy funktsionalnoyotvechat your ideas stilenu and, of course, affordable choice models of mice in the Russian market is huge. Let's try to hold them classification. By type of interface connection to a computer: USB – universal fit, as to personal computers and laptops, netbooks, equipped with a port USBPS / 2 – are mostly designed for desktop computers, since modern laptops are usually not equipped with a PS / 2 port for the type of sensor: Optical – to illuminate the ground on which the mouse moves, a special diodLazernye – to highlight surface of the semiconductor laser is used, which allows for more precision work that requires designers, gamers type of connection to the computer: Wired – using a cable, can be uncomfortable and old-fashioned, but reliable and nedorogoBesprovodnye – a communication channel, it can be a radio frequency and more exotic – via Bluetooth, for example by size: desktop (large, length 10-11cm) – designed to work home, ofiseMini (6-7cm long) – medium razmerovUltra mini (length 4-5cm) for notebook computers, we recommend to stop your choice on wired mini optical mouse with interface USB. There are several reasons: Relatively low – no driver and a special equipped nastroykMogut mosey into the coil cable, which saves space, as well as more convenient to carry and operate myshyuDostupnaya the price at retail such manipulators are from 300 to 1,000 rubles Please pay attention to the mouse KS-is. Their distinctive features are: An attractive case design, developed in Japan, is designed to reduce stress on your wrist when working with manipulyatoromUniversalny – suitable as a right and a left rukuKachestvennye materials and color options komponentyRazlichnye case – will be combined with the different mobile computer mice – a useful accessory for any mobile computer!