Showing posts with label about. Show all posts

Tuesday, November 15, 2016

About servers cloud

What are Cloud Servers?

In some respects cloud servers work in the same way as physical servers but the functions they provide can be very different. When opting for cloud hosting, clients are renting virtual server space rather than renting or purchasing physical servers. They are often paid for by the hour depending on the capacity required at any particular time.

Traditionally there are two main options for hosting: shared hosting and dedicated hosting. Shared hosting is the cheaper option whereby servers are shared between the hosting provider’s clients. One client’s website will be hosted on the same server as websites belonging to other clients. This has several disadvantages including the fact that the setup is inflexible and cannot cope with a large amount of traffic. Dedicated hosting is a much more advanced form of hosting, whereby clients purchase whole physical servers. This means that the entire server is dedicated to them with no other clients sharing it. In some instances the client may utilise multiple servers which are all dedicated to their use. Dedicated servers allow for full control over hosting. The downside is that the required capacity needs to be predicted, with enough resource and processing power to cope with expected traffic levels. If this is underestimated then it can lead to a lack of necessary resource during busy periods, while overestimating it will mean paying for unnecessary capacity.

With cloud hosting clients get the best of both worlds. Resource can be scaled up or scaled down accordingly, making it more flexible and, therefore, more cost-effective. When there is more demand placed on the servers, capacity can be automatically increased to match that demand without this needing to be paid for on a permanent basis. This is akin to a heating bill; you access what you need, when you need it, and then only pay for what you’ve used afterwards.

Unlike dedicated servers, cloud servers can be run on a hypervisor. The role of a hypervisor is to control the capacity of operating systems so it is allocated where needed. With cloud hosting there are multiple cloud servers which are available to each particular client. This allows computing resource to be dedicated to a particular client if and when it is necessary. Where there is a spike in traffic, additional capacity will be temporarily accessed by a website, for example, until it is no longer required. Cloud servers also offer more redundancy. If one server fails, others will take its place.

Below are the key benefits of cloud servers:

Flexibility and scalability; extra resource can be accessed as and when required
Cost-effectiveness; whilst being available when needed, clients only pay for what they are using at a particular time
Ease of set up; Cloud servers do not require much initial setup
Reliability; due to the number of available servers, if there are problems with some, the resource will be shifted so that clients are unaffected.

Go to link download

ten amazing secrets about windows xp

Some may believe that there is no longer new to talk about windows xp , but in this article well show you some innovative ideas and new tricks.

Windows XP secrets

Has a lot of users of Windows XP and Office XP programs on large familiar with each of them ..Some may believe that there is no longer new to talk about, but in this article well show you some innovative ideas and new tricks That may lead to your knowledge or learn new things, including the performance of a task you find by the complex.

1 - rename multiple files in a single step

If there is a lot of files that you want to rename at once heres an innovative way to do so:- Select all the files you want to rename.- Right-click on the first file and choose "rename" Rename and then name the file a new name (for example, not Photo).- Now Windows will rename the rest of the files automatically sequentially (file names will be Photo (1)Then Photo (2), and so on ...).

2 - more space for thumbnails

When you view the contents of the folder in the form of "thumbnails" Thumbnail file names appear under each image, and you can cancel Display file names and photos only sufficiency,By pressing the Shift key on the keyboard and keep it pressed while you open the folder or during choose to display the contents of a folder
As thumbnails.

3 - Get rid of Thumbs.db files

When you view the contents of the folder display of folders in a manner "thumbnails" Thumbnail system Windows XP Create a file named Thumbs.db contains information about this folder in order to accelerate the thumbnail view in the following times to open this folder.If you want to prevent Windows from creating these files to save space on the hard drive device, follow these steps:- Open the window "computer" My Computer- From the list of "Tools" Tools Select "Folder Options" Folder Options- Click on the tab "see" View - Now you can delete all Thumbs.db files from the hard drive device, Windows does not create again.

4 - Select Details of the Details

When you choose to view the contents of a folder style "details" Details You can specify the details that are stated as follows:- From the list of "Show" View item "Choose Details" Choose Details- Select the details that you want to show

.5 - Where hibernation Hibernate?

In the dialog box to turn off Windows XP three buttons appear to have three choices "standby" Stand By And "off" Turn Off "reboot" Restart, and represents the option button appears "Hibernate" Hibernate,To show this button press the Shift key on the keyboard during a dialog box appears to turn off Windows.

6 - Cancel hibernation

If hibernation Hibernation cause a problem for your device or consumes a large area of ??the hard drive you can cancel Hibernation completely, and are as follows:- In the Control Panel double-click your mouse over the icon "power options" Power Options- Click the tab "Hibernate" Hibernation- Unchecked the item "Enable hibernation" Enable Hibernation

7 - More Windows components that can be added or removed

For some unknown reason the setup program asks Windows XP software that you want to add, and even after the end of the setup process
In the control panel, and to overcome this problem, follow these steps:- Open sysoc.inf file inside the inf folder inside the folder that contains the Windows system files- Delete the word HIDE lines and save the file modifications.- Now Open Add / Remove Programs in the Control Panel.- Click the Windows components and youll find that it has become to have a larger list of ingredients that can be added or deleted.

8 - can be dispensed with

There are a lot of "services" Services that can be dispensed with when the system starts Windows XP,And to identify those services click with your mouse double-click the icon "Administrative Tools" Administrative Tools Then double-click the "Services" Services where you will find a list of those services, and as soon as you click each service shows you explain For the task carried out and therefore you can choose to disable Disable and make it work manually Manually such as the following services:Alerter

Application Management

Clip book

Fast User Switching Human Interface Devices Indexing

Service Messenger Net Log on Net Meeting QOS RSVP Remote

Desktop Help Session Manager

Remote Registry Routing & Remote Access SSDP Discovery

Go to link download

Full information about computer storage devices

Hello again my friends the last lesson we talk about Ram, ROM and cached memory .This lesson we will talk about storage devices in computer. Lets start now.

Storage Devices

The volumes are the units that can keep your data and programs and those units are divided into: solid cylinders, and floppy discs, CDs (laser CDs), and the multifaceted digital roller, and the magnetic strip, and flash memory.

Hard Disks

A small unit in the size of the palm of the hand almost always exist in and installed in the central processing unit (CPU) and the cylinder characterized by sizable storage capacity as they reach the storage capacity to store more than ten thousand books any nearly ten billion character.

Floppy Disks

There are two types 3.5-inch floppy discs are now used in the process of saving data view of their small size and the large size of the storage capacity flexible cylinders 5.25 is no longer used now concision consider the small size of the amplitude storage and large size.

Compact Disks (CD)

CDs or laser discs are the latest means of storage where they are used to store audio and video clips, where storage capacity of up to 650 six hundred and fifty million characters. The disadvantage of this quality that they can not register only once and only one.

DVD Digital Versatile Disk

It is a type of high-capacity CDs used to store 2.10 GB of information. And used compact disc (CD) to store music, usually used to store high-quality movies instead of video tapes

Magnetic Tape

This type of storage media similar to what we see in the world of audio cassettes magnetic audio recorder and based on the same technology information is stored in the form of magnetic points sequentially, and these strips are commonly used in save backups of data.

Flash Memory

Is a memory used to store data and is characterized by its small size and large storage capacity, where up to more than GB, can also scan data from them and write them more than once and is connected to the computer by USB.

After explaining parts Computer physical detail must clarify the relationship and the extent of interdependence of each part with the other to carry out operations required from the computer example for doing arithmetic what first must enter numbers by Input units are then processed by the control unit Central to get the results that are brought out of During the output units, and stored by the storage units and the following figure illustrates the interdependence of computer parts with each.

My friend now we finished the first part of computer components (Hardware Components) the next lesson we will talk about computer software part .To be continued .Thank you

Engineer: Ashraf Mansour

Egypt

Previous Lessons

Computer InputUnits

Computer OutputUnits

CPU

Main Memory

Go to link download

About Cloud Computing What is Cloud Computing

What is Cloud Computing?

Cloud computing is a topic that many find confusing. It isn’t, though, as confusing as it sounds. In fact, most of those who claim not to understand the subject are part of the majority that use it daily.

In basic terms, cloud computing is the phrase used to describe different scenarios in which computing resource is delivered as a service over a network connection (usually, this is the internet). Cloud computing is therefore a type of computing that relies on sharing a pool of physical and/or virtual resources, rather than deploying local or personal hardware and software. It is somewhat synonymous with the term ‘utility computing’ as users are able to tap into a supply of computing resource rather than manage the equipment needed to generate it themselves; much in the same way as a consumer tapping into the national electricity supply, instead of running their own generator.

One of the key characteristics of cloud computing is the flexibility that it offers and one of the ways that flexibility is offered is through scalability. This refers to the ability of a system to adapt and scale to changes in workload. Cloud technology allows for the automatic provision and deprovision of resource as and when it is necessary, thus ensuring that the level of resource available is as closely matched to current demand as possible. This is a defining characteristic that differentiates it from other computing models where resource is delivered in blocks (e.g., individual servers, downloaded software applications), usually with fixed capacities and upfront costs. With cloud computing, the end user usually pays only for the resource they use and so avoids the inefficiencies and expense of any unused capacity.

However, the advantages of cloud computing are not limited to flexibility. Enterprise can also benefit (in varying degrees) from the economies of scale created by setting up services en masse with the same computing environments, and the reliability of physically hosting services across multiple servers where individual system failures do not affect the continuity of the service.

There is also great choice in the level of security and management required in cloud deployments, with an option to suit almost any business:

A public cloud, for example, is a cloud in which services and infrastructure are hosted off-site by a cloud provider, shared across their client base and accessed by these clients via public networks such as the internet. Public clouds offer great economies of scale and redundancy but are more vulnerable than private cloud setups due their high levels of accessibility. More information can be found on our ‘What is a Public Cloud?’ page.

Private clouds on the other hand use pooled services and infrastructure stored and maintained on a private network – whether physical or virtual – accessible for only one client. The obvious benefits to this are greater levels of security and control. Cost benefits must be sacrificed to some extent though, as the enterprise in question will have to purchase/rent and maintain all the necessary software and hardware. More information can be found on our ‘What is a Private Cloud?’ page.

The final cloud option is a hybrid cloud and this, as the name suggests, combines both public and private cloud elements. A hybrid cloud allows a company to maximise their efficiencies; by utilising the public cloud for non-sensitive operations while using a private setup for sensitive or mission critical operations, companies can ensure that their computing setup is ideal without paying any more than is necessary. More information can be found on our ‘What is a Hybrid Cloud?’ page.

Moving away from deployment models, broadly speaking there are 3 models of cloud computing which describe the service on offer; these are Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS).

As with the other cloud computing categories, IaaS refers to the delivery of virtualised computing resource as a service across a network connection. IaaS specifically deals with hardware – or computing infrastructure - delivered as a service. Offerings include virtualised server space, storage space, network connections and IP addresses. The resource is pulled from a pool of servers distributed across data centres under the provider’s control, the user is then granted access to this resource in order to build their own IT platforms. IaaS can provide enterprises with great business benefits. More information on IaaS can be found on our ‘What is IaaS’ page.

PaaS is an extension of IaaS and describes a category of cloud computing that provides developers with environments in which to build applications, over the internet. In addition to the fundamental computing resource supplied by the hardware in an IaaS offering, PaaS models also include the software and configuration (often known as the solution stack) required to create the platform on which clients can create their applications. PaaS packages can be tailored to meet individual user needs; they can cherry pick the features of the service that are relevant to them while disregarding those that are not. PaaS provides a number of benefits to enterprises, including simplifying the development process for geographically split development teams. More information about Platform as a Service can be found on our ‘What is PaaS’ page.

SaaS is arguably the most common of the cloud computing variations; it’s the term used to describe a software delivery model in which applications are hosted (usually by a provider) and made available to customers over a network connection. Many people make use of SaaS without realising it as many web applications are delivered in this way; Gmail, Flickr, Twitter and Facebook are all popular examples of SaaS. Enterprise users also frequently make use of SaaS with many popular accounting, invoicing, sales, communications and CRM systems being delivered this way. More information about Software as a Service can be found on our ‘What is SaaS’ page.

Go to link download

what do you know about Computer Output Units

Hello my friends we meet together again with another lesson (computer output units).If you see the last lesson it was about (computer input units) and we explain in it all computer input units .Today we will explain every thing about computer output units .Dont worry my friends you will be professional very soon. We start from begging .Lets see our lesson.

Computer Output Units

Today we will start to talk about computer output units .We will talk in details about that in this lesson .Those units responsible for all operations and extraction results, which was implemented by the computer according to the instructions issued by the user .Computer output units is the devices that we connect it to computer and take the output from it like speakers or data like printers or picture like monitor .Computer output units divided to:

Monitors
Speakers
Printers

We will take about every device in details .Lets see

Monitors

Is one of the most important units Computer output so that the screen shows what is entered for computer of letters and numbers and photos etc.. As the screen displays the data previously recorded on the computer.

Speakers

Headphones & speakers are units of data output from the computer. And used in the output of sounds, songs and music. And you can control the degree of high and low sound.

Printers

It is also a unit of output data from the computer. And used in the output data and information (letters - numbers - Photos) printed on the papers.

There is another type of printers called PLOTTERS

PLOTTERS

It is also a unit of output data from the computer. And used in the output graphs and engineering high volumes printed on.

We finish the lesson now .I hope all my friends understand this lesson very well .The next lesson well be about CPU .Thanks my friends....

Engineer: Ashraf Mansour

Egypt

You Can see the last lesson from here

Computer InputUnits

Go to link download

BLENGOK

Tuesday, November 15, 2016

About servers cloud

About servers cloud

What are Cloud Servers?

Monday, November 14, 2016

ten amazing secrets about windows xp

ten amazing secrets about windows xp

Saturday, November 12, 2016

Full information about computer storage devices

Full information about computer storage devices

Wednesday, November 9, 2016

About Cloud Computing What is Cloud Computing

About Cloud Computing What is Cloud Computing

What is Cloud Computing?

Tuesday, October 18, 2016

what do you know about Computer Output Units

what do you know about Computer Output Units