Saturday, April 14, 2018

Tabula Rosa Systems Blog Of 4/14/2018





Zombie VM
A zombie VM is a virtual machine that is created, often for a particular purpose, and is forgotten when it is no longer needed for that purpose. As a result, the VM continues to consume resources while performing no useful work. The proliferation of zombie VMs in a data center is one of the main causes of virtualization sprawl.
Virtual machines can be created quickly and easily and only use a very small portion of the physical infrastructure's resources to run. When virtual instances are created faster than they are removed, however, the result is virtualization sprawl. The irony of virtualization sprawl is that it can cancel out the benefits that make virtualization attractive and cost-effective in the first place, costing the company money by tying up operating system licenses, servers and database resources without adding any value.
Most zombie VMs are simply temporary virtual servers that have been forgotten due to lax tracking procedures. Ideally, the creation of each VM should be documented, along with its purpose and owner. When a VM is no longer required, it should be removed. Once virtualization sprawl has occurred, it becomes necessary to differentiate zombie VMs from the productive ones. Indications of a zombie VM include an absence of recent support tickets and low CPU, network and disk utilization.

Zombie prevention requires both policies and software tools. Management policies should be put in place to guide the creation and retention of VMs and storage instances. Then, software tools can be used to identify VM instance owners, report on recent usage and specify how long resources have been idle. Ideally, VM governance tools will raise an alert when a machine rests unused for a defined period of time and automatically spin down the zombie and recover its licenses.
The zombie VM's physical counterpart in the data center is the zombie server.
+++++++++++++++++++++
   Good Netiquette
 And A Green Internet To All!  =====================================================================
Tabula Rosa Systems - Tabula Rosa Systems (TRS) is dedicated to providing Best of Breed Technology and Best of Class Professional Services to our Clients. We have a portfolio of products which we have selected for their capabilities, viability and value. TRS provides product, design, implementation and support services on all products that we represent. Additionally, TRS provides expertise in Network Analysis, eBusiness Application Profiling, ePolicy and eBusiness Troubleshooting. We can be contacted at:
sales@tabularosa.net  or 609 818 1802.
 ===============================================================
In addition to this blog, Netiquette IQ has a website with great assets which are being added to on a regular basis. I have authored the premiere book on Netiquette, “Netiquette IQ - A Comprehensive Guide to Improve, Enhance and Add Power to Your Email". My new book, “You’re Hired! Super Charge Your Email Skills in 60 Minutes. . . And Get That Job!” has just been published and will be followed by a trilogy of books on Netiquette for young people. You can view my profile, reviews of the book and content excerpts at:


Anyone who would like to review the book and have it posted on my blog or website, please contact me paul@netiquetteiq.com.

In addition to this blog, I maintain a radio show on BlogtalkRadio  and an online newsletter via paper.li.I have established Netiquette discussion groups with Linkedin and  Yahoo.  I am also a member of the International Business Etiquette and Protocol Group and Minding Manners among others. I regularly consult for the Gerson Lehrman Group, a worldwide network of subject matter experts and I have been contributing to the blogs Everything Email and emailmonday . My work has appeared in numerous publications and I have presented to groups such as The Breakfast Club of NJ and  PSG of Mercer County

No comments:

Post a Comment