Following my initial introduction to Hadoop and overview of Hadoop
components, I studied the Yahoo Hadoop tutorial, and have a deeper
understanding of Hadoop. I would like to share my learning and help others
Why does Hadoop require HDFS, what's wrong with NFS?
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Nothing! NFS been around for years and is incredibly stable. A distributed
file system, such as NFS, provides the functionality required for servers to
share files. It does this by exposing a volume to the network, which users
connect to over the TCP/IP protocol.
For Hadoop applications that require highly available distributed file
systems with unlimited capacity HDFS is preferred. The following table
outlines where NFS is deficient for Hadoop and where HDFS solves the
NFS limitation Hadoop optimization What happens when the volume ... (more)
In prior blog posts, I described Infrastructure as a Service (IaaS) and
Platform as a Service (PaaS).
If I use IaaS I get servers onto which I can load software and applications
which I then maintain, though I don't need to maintain the hardware. I can
customize the applications and software running on the servers, at will. If I
use PaaS, I get a platform of ready to use web servers, application servers,
databases etc. I write my own software application and host it at the PaaS
provider. I maintain the software I write, but not the application servers,
databases or ha... (more)
Eucalyptus is an open source Infrastructure as a Service cloud offering. What
is unique about Eucalyptus is that it is compatible with Amazon AWS APIs.
This means that you can:
Use Eucalyptus commands to manage Amazon or Eucalyptus instances. Freely move
instances between a Eucalyptus private cloud and the Amazon Public cloud to
create a hybrid cloud.
Eucalyptus leverages operating system virtualization, such as KVM or XEN, to
achieve isolation between applications and stacks. Operating system
virtualization dedicates CPU and RAM to systems and applications such that
they don't ... (more)
As a follow up to my article on Infrastructure as a Service, here is a four
Following my introduction to Infrastructure as a Service (IaaS), I published
a review Microsoft Azure IaaS on the WindowsITPro website here:
My article is also currently appearing on the main Windows IT Pro page, about
a third of the way down the list
Thank you to WindowsITPro and Penton Media for their assistance