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Storage Area Network in Cloud

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Sunday, 07 August 2011 13:15

A storage area network (SAN) is a dedicated storage network that provides access to consolidated, block level storage. SANs primarily are used to make storage devices accessible to servers so that the devices appear as locally attached to the operating system. A SAN typically has its own network of storage devices that are generally not accessible through the regular network by regular devices. The cost and complexity of SANs dropped in the early 2000s, allowing wider adoption across both enterprise and small to medium sized business environments. SAN now plays an important part in today's cloud hosting environments.


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Cloud Computing

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Last Updated on Thursday, 12 May 2011 07:22 Written by Administrator Thursday, 12 May 2011 07:19

Cloud computing refers to the provision of computational resources on demand via a computer network. Because the cloud is the underlying delivery mechanism, cloud based applications and services may support any type of software application or service in use today. Before the advent of computer networks, both data and software were stored and processed on or near the computer. The development of Local Area Networks LAN allowed for a tiered architecture in which multiple CPUs and storage devices may be organized to increase the performance of the entire system. LANs were widely deployed in corporate environments in the 1990's, and are notable for vendor specific connectivity limitations. These limitations gave rise to the marketing term "Islands of Information" which was widely used within the computing industry. The widespread implementation of the TCP/IP protocol stack and the subsequent popularization of the web has lead to multi-vendor networks that are no longer limited by company walls.

Cloud computing fundamentally allows for a functional separation between the resources used and the user's computer. The computing resources may or may not reside outside the local network, for example in an internet connected datacenter. What is important to the individual user is that they 'simply work'. This separation between the resources used and the user's computer also has allowed for the development of new business models. All of the development and maintenance tasks involved in provisioning the application are performed by the service provider. The user's computer may contain very little software or data (perhaps a minimal operating system and web browser only), serving as little more than a display terminal for processes occurring on a network of computers far away. Consumers now routinely use data intensive applications driven by cloud technology which were previously unavailable due to cost and deployment complexity. In many companies employees and company departments are bringing a flood of consumer technology into the workplace and this raises legal compliance and security concerns for the corporation.

A common shorthand for a provided cloud computing service (or even an aggregation of all existing cloud services) is "The Cloud". The most common analogy to explain cloud computing is that of public utilities such as electricity, gas, and water. Just as centralized and standardized utilities free individuals from the difficulties of generating electricity or pumping water, cloud computing frees users from certain hardware and software installation and maintenance tasks through the use of simpler hardware that accesses a vast network of computing resources (processors, hard drives, etc.). The sharing of resources reduces the cost to individuals.

The phrase “cloud computing” originated from the cloud symbol that is usually used by flow charts and diagrams to symbolize the internet. The principle behind the cloud is that any computer connected to the internet is connected to the same pool of computing power, applications, and files. Users can store and access personal files such as music, pictures, videos, and bookmarks or play games or use productivity applications on a remote server rather than physically carrying around a storage medium such as a DVD or thumb drive. Almost all users of the internet may be using a form of cloud computing though few realize it. Those who use web-based email such as Gmail, Hotmail, Yahoo, a Company owned email, or even an e-mail client program such as Outlook, Evolution, Mozilla Thunderbird or Entourage are making use of cloud email servers. Hence, desktop applications which connect to cloud email would be considered cloud applications.
 

ImageMagick Installation for PHP

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Last Updated on Wednesday, 01 December 2010 10:37 Written by Administrator Wednesday, 01 December 2010 10:29

You need two components to make this work.

1.ImageMagick and its development libraries installed on the server.
2.Imagick.so which is the wrapper for php.

Imagick.so acts as a wrapper utilizing the native library that comes with ImageMagick library on the server.

To begin with you need to confirm all the latest ImageMagick modules and its libraries are installed on the server. The important thing to note is that 'pecl install imagick' will not work directly on the server. Nor will traditional steps given at,

http://forum.fdcservers.net/showthread.php?t=3392&page=1
OR
http://www.cpaneladmins.com/2009/11/10/how-to-install-imagick-for-php/

You need to install it manually with the latest ImagMagick library and the latest pecl from http://pecl.php.net/package/imagick.

1.Cd /usr/src/
2.yum install ImageM*
3.If you already have an ImageMagick library installed on the server, it is best you upgrade it. You can do so by 'yum reinstall ImageM*'.
4.After this you need to download the latest imagick native php extension from http://pecl.php.net/package/imagick.
5.wget http://pecl.php.net/get/imagick-3.0.1.tgz
6.At the time of writing this doc 3.0.1 was the latest version. Free free to modify with the latest after checking the build at the URL http://pecl.php.net/package/imagick.
7.tar -zxvf imagick-3.0.1.tgz
8.cd imagick-3.0.1
9.phpize
10../configure
11.make
12.make install
13.Once this is complete, the imagick.so file will have copied over to /usr/local/lib/php/extensions/no-debug-non-zts-20060613/ based on your installation.
14.Header files also will have copied over to /usr/local/include/php/
15.vi  /usr/local/lib/php.ini
16.Add “extension=imagick.so” to php.ini above.
17.Check phpinfo.php and it will now reflect the ImageMagick extension. phpinfo
   

Flash or jQuery? Which way to go?

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Last Updated on Friday, 12 November 2010 14:49 Written by Administrator Friday, 12 November 2010 14:29

jQueryFlash is losing its charm, as it is heavy and not search engine friendly. jQuery, though not as flexible as Flash, can  achieve loads of interesting effects and allow us to replace Flash to a certain extent.
Javascript is the most commonly used client side scripting language. It is used for validating user data, and  is able to create a better user interface. Javascript effects are much faster to load. There is absolutely no need of downloading any Plugin for it like flash and other front-end tools. JavaScript can be written in any HTML editor and does not require any specific software or license.

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What is Joomla?

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Last Updated on Thursday, 14 October 2010 10:51 Written by Administrator Monday, 27 September 2010 12:29

JoomlaJoomla is completely a free Content Management System software that can easily be used by a person who has an average or a "just-above-average" level of expertise using MS-Word, which has been the prime reason for it to become so popular. Though there are quite a few CMS applications available in the market today, majority of the web design / development firms suggest using Joomla than the others, which is easier for them to manage.

Joomla is an open-source (source code is available for free on the internet) application can actually deliver more results / output than what it actually is expected to deliver. It is rated high in terms of reliability, quality and affordability. Joomla is considered to be the most ideal package for any designing company.

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