[ale] Memory and virtualization

[Beddingfield, Allen]

Under VMware, you have "transparent page sharing" (http://www.virtualizationadmin.com/blogs/lowe/news/what-is-transparent-page-sharing-2-335.html), and memory overcommitment with ease.  From Redhat's propaganda, they claim to be able to do something similar.  I know that this ONLY works correctly on VMware if their tools are running, so I would suspect the same to be true of RHEV.  I know  from experience that it is a hard allocation with XEN virtualization.


Allen Beddingfield
Systems Engineer
The University of Alabama

On 7/12/13 7:16 AM, Lightner, Jeff wrote:
Given that Linux pre-caches/pre-buffers most memory presented to it what impact if any does this have to memory allocation to a virtual guest for the virtual platform itself?    That is to say if one has a mix of Linux and Windows virtual machines on say Hyper-V or MWare does the memory allocated to each Linux guest become totally unavailable to other guest machines because of this pre-allocation or is oversubscription possible without impacting the guest machines?

P.S. Don’t tell me not to use Hyper-V unless you can provide documentation it absolutely won’t work for RHELinux guests – I didn’t make the choice and won’t be able to undo it    My question is NOT asking which virtualization platform to use.











Athena®, Created for the Cause™

Making a Difference in the Fight Against Breast Cancer





How and Why I Should Support Bottled Water!
Do not relinquish your right to choose bottled water as a healthy alternative to beverages that contain sugar, calories, etc. Your support of bottled water will make a difference! Your signatures count! Go to http://www.bottledwatermatters.org/luv-bottledwater-iframe/dswaters and sign a petition to support your right to always choose bottled water. Help fight federal and state issues, such as bottle deposits (or taxes) and organizations that want to ban the sale of bottled water. Support community curbside recycling programs. Support bottled water as a healthy way to maintain proper hydration. Our goal is 50,000 signatures. Share this petition with your friends and family today!



---------------------------------
CONFIDENTIALITY NOTICE: This e-mail may contain privileged or confidential information and is for the sole use of the intended recipient(s). If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.
----------------------------------