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Citrix on VMware, Oil and Water?

Citrix at a high load can be a demanding application due to high kernel-resource utilization and a high level of context switches associated with its underlying Terminal Server architecture. But in many environments this high utilization often doesn't occur. Many times, application conflicts -- or the need for security isolation among applications or users -- force a horizontal scaling of Citrix servers. These kinds of applications or users that can't cohabitate on a single server can result in an organization buying new Presentation Servers even though existing server utilization is low.

In a virtualized environment, multiple server instances are enabled to run on the same physical server chassis. When application conflicts or security requirements force additional servers to be brought online, virtualization can enable it to be done with relative ease. You can copy and paste new servers to your heart's content until the hardware resources of your physical chassis max out.

VMware recently completed scalability tests that involved initiating a series of increasing user log-ons to a virtualized Citrix server, followed by a pre-recorded series of actions using Microsoft Word. The test simulated users logging in, opening a Word document and typing for up to 15 minutes. CPU resources were measured so as to identify the number of users capable of being supported by the hardware chassis when running at up to 80 percent of CPU utilization.


Greg Shields is a renowned writer and trainer. Read the rest here...

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A Collection of Threnodies : Part 1

Whale Fall
-----------------

Dress me up in my new threads
clasp my greasy palms
grease my hair
I'm ready for the fall


Watch at all the decadence
watching the avalanche
I'm slipping down
losing my buoyancy


What's become of us
where have we come
this far, this close
close to the doors


I hear them, sublimal chants
I'm on the run
I race through the human sea
I am the king!


I'm the slave
to my own undoings
I'm the jester in my courtyard
We jest as we run


We're strolling on that thin rope
we grope as we rope
we're true heros
we're the survivors


we're the scavengers
we're the friends
we're the lovers
we're the unbred


Soon awaiting the fall
we're lurking on us
we're osedaxing us
we're soon going to be done
we'll soon be arrested




*osedax(bone devourer, newly discovered marine genus) feeds on a fallen(sunken) whale carcass(which is also called a whale fall). Read more here