Skip to main content

Cloud Computing

The concepts underlying cloud computing date back to at least 1960s, when American computer scientist John  McCarthy said that "computation may someday be organized as a public utility". Cloud computing is still an evolving paradigm, but it seems well positioned to displace client-server computing model, much like it displaced mainframe based computing in the early 1980’s.

It may also be argued that cloud computing represents a return to a centralized (mainframe based) model, but at the next evolutionary level (including incorporation of some aspects of the client-server model and various new technologies) – with distributed systems and datacenters replacing the central mainframe; high-powered, reach media devices (personal computers, smart phones, etc.) replacing dumb terminals; and with more or less ubiquitous broadband Internet access replacing low bandwidth private communication links.

Previous attempts to bring about models similar in concept to cloud computing had limited success or simply failed. Sun Microsystems’ network based computing is a good example of that. It became best known by the phrase supposedly coined by John Gage (computer scientist, then at Sun Microsystems) - “The Network is the Computer”. The phrase was frequently used by then Sun Microsystems’ CEO Scott McNealy and pretty much became company’s motto, but the notion of network based computing gained little traction.

So, why does cloud computing popularity seem to grow by leaps and bounds? – It appears to be the right computing model and the right time. Cloud computing goes beyond its predecessors by incorporating results of the research on large scale computing by  a number of universities, by building on innovations from Amazon, Google, IBM, Microsoft, and other cloud pioneers; and it is powered by recent advances in computer and communications technologies (increased capabilities and lower costs) as well as virtualization and other methods of infrastructure abstraction. Finally, cloud computing combines technological advances with economies of scale and an innovative business approach for an on-demand, utility-like model of allocation and consumption of computing resources.

National Institute of Standards and Technology (NIST) gives cloud computing the following definition – “Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.”


  1. This post is so informative and makes a piece of very nice information on the topic in my mind. It is the first time I visit your blog, but I was extremely impressed. Keep posting as I am gonna come to read it every day. visit here Cloud PBX Houston


Post a Comment

Popular posts from this blog

Skype for Business and VTC Interoperability

Skype for Business (SfB) has a very, very strong potential, I have written about it in my previous post. I can't think of any other platform that shows as much promise in terms of bridging personal and business communications as well as unifying different modes and mediums. And all of this may have started with a strategic acquisition of Skype by Microsoft in 2011.

That said, the road ahead is not without challenges. For example, interoperability with other platforms. Making SfB work with existing Video TeleConferencing (VTC) systems, many of which represent significant capital investments in organizations' infrastructure, could be of a particular importance.

After reading statements like Skype for Business is based on Session Initiation Protocol (SIP) standards and supports H.264 (MPEG-4 video coding standard) one can come to a quick conclusion that integration and/or interoperability with other VTC solutions is easy or nearly automatic. Unfortunately, the industry is not qui…

PoSh Disable and Move AD Users

A quick and easy way to disable user accounts and move them into designated OU:

Import-Csv "C:\TEMP\users.csv" | ForEach-Object { `      $u=$_."sAMAccountName"; $l="Disabling and moving: " +$u; write-output $l; `      Get-ADUser -Identity $u | `      Disable-ADAccount -PassThru | `      Move-ADObject -TargetPath "OU=Disabled Users,OU=Organization,DC=domain,DC=local"
Input is provided via a CSV file:
users.csv (username) sAMAccountName  jdoe1  jdoe2  jdoe3  jdoe4  jdoe5  

To generate input file run something like this, review and edit as necessary:
Search-ADAccount –UsersOnly –AccountInactive –TimeSpan 180.00:00:00 | `      where {$_.enabled} | `      Get-ADUser | `      select sAMAccountName | `      Export-Csv -Path "C:\TEMP\users.csv"

WordPress displays weird characters

Sometimes after a database conversion (e.g. from MySQL to MariaDB) or due to encoding issues a situation might arise when WordPress is showing weird characters. A quick way of remedying the situation would involve examining the pages to discover a pattern (what characters are being substituted, in the example below the apostrophe was replaced by â€™) then running an queries against the database to reverse the effect. Here's a quick example (common tables that store content):

UPDATE wp_posts SET post_content = REPLACE(post_content, 'Â', '')     UPDATE wp_posts SET post_content = REPLACE(post_content, '’', "'")     UPDATE wp_postmeta SET meta_value = REPLACE(meta_value, 'Â', '')     UPDATE wp_postmeta SET meta_value = REPLACE(meta_value, '’', "'")     
Please, keep in mind that to permanently resolve the issue you would need to get to the root of the problem and may need to adjust encoding, run a databas…