This blog post is a summary of AWS (Amazon WebServices and is gleaned from
Jeff Barr's webcast, here: http://youtu.be/CaJCmoGIW24).
I will simply explain each box in the above picture, at a high level, and
explore further in future blog posts as I delve further into AWS.
(AWS is an abbreviation for Amazon Web Services)
Amazon Global Physical Infrastructure
AZ - Amazon zone - When you create an Amazon instance, you can select a
region for your instance - USA, Eerope, AsiaPacific, Government/Federal.
Separated zones - provided to allow for separate datacenters, power cooling
and high availability.
Amazon EC2 - This is AWS' elastic compute cloud, the virtual hardware that
makes up a customer's virtual datacenter that they store in the Amazon cloud.
It is on-demand compute power that can scale up and down as needed;
add/remove VMs as needed. Virtual hardware such... (more)
Following my high level description of OpenStack, I now delve in the install
This post is a manual install of OpenStack on Centos. Although the steps are
experience was that the output of each command results in text strings that
are required in subsequent commands. Thus I have colour coded each text
string output so that the text can be accurately used in subsequent commands.
(This is post one of five; posts two, three, four and five to follow will
detail the install of the... (more)
A first-degree direct LinkedIn connection implies that the two parties know
Using this assumption, two unconnected LinkedIn users attempt to connect via
an intermediary. What often happens is that the first degree connections are
in fact very weak connections, and thus of no use to the third party
attempting to connect via the intermediary.
I log into LinkedIn and would like an introduction to Brent.
I view Brent's profile and notice that his first degree connection, Brian, is
also a first degree connection with me.
So I ask Brian for an int... (more)
In this posting, I summarize my prior three posts on the three cloud
computing offerings: Infrastructure as a Service (IaaS), Platform as a
Service (PaaS) and Software as a Service (SaaS).
I concentrate how the three offerings differ with respect to flexibility,
maintenance and portability. One of the greatest challenges companies face
when moving to the cloud is security. Thus I will devote an entire blog post
in the future, to security concerns.
How much flexibility do you have with each offering? What can you change or
modify within each cloud offering to suit you... (more)
Amazon Web Services – Disaster Recovery, High Availability and Fault
AWS - Amazon Web Services AMI - Amazon Machine Instance DR - Disaster
Recovery FT - Fault Tolerance HA - High Availability
High Availability and Fault Tolerance – the requirement that a computer
application be seemlessly available to users without interruption, literally
“no (or very little) fault will be tolerated”. In simple speak, this
means that I am able to use a computer application even though in the
background there may be outages, for example har... (more)