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Paper: Best Practices for Oversubscription of CPU, Memory and Storage in vSphere Virtual Environments

VKernel, now part of DELL has released a paper titled:"Best Practices for Oversubscription of CPU, Memory and Storage in vSphere Virtual Environments". The paper which can be downloaded after registration contains 13 pages and is written by Scott D. Lowe...

Posté par jcdemarque à 22:28 - Commentaires […] - Permalien [#]

Tags: VMWare, CPU, white paper, esxi, storage, vSphere, memory, overcommit

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21 juin 2011

VMware vFabric 5 optimise la gestion des ressources mémoire

VMware vFabric 5 propose un nouveau modèle de licence (par machine virtuelle) et une optimisation dynamique de la mémoire utilisée par les applications Java. VMware vient d’annoncer la sortie de vFabric 5, sa plate-forme applicative dédiée aux environnements...

Posté par jcdemarque à 13:45 - Commentaires […] - Permalien [#]

Tags: VMWare, memoire, memory, java, apache, tomcat, vfabric

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4 mai 2011

Understanding Memory Compression in vSphere 4.1

vSphere 4.1 comes with a new performance-enhancing feature called memory compression. It can give your system a performance boost when it starts running low on RAM. Just like swap memory, memory compression is not equal to real memory but can help to...

Posté par jcdemarque à 15:07 - Commentaires […] - Permalien [#]

Tags: VMWare, optimisation, compression, vSphere, memoire, memory, 4.1

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3 septembre 2010

Guest Paging vs. Virtualization Paging and Negative Memory Availability

Jeff has discussed this at some length over on the virtualization team blog, but as a general rule of thumb we believe that it is much better to have paging occur inside the guest operating system rather than at the virtualization layer (if paging is...

Posté par jcdemarque à 18:56 - Commentaires […] - Permalien [#]

Tags: Hyper-V, Microsoft, Windows 2008, SP1, R2, memory, paging

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14 avril 2010

Dynamic Memory Coming to Hyper-V Part 3…

Memory Overcommit, an Overloaded Term… When it comes to virtualization and memory, I regularly hear the term “memory overcommit” used as if it’s a single technology. The problem is that there are numerous techniques that can be employed to more efficiently...

Posté par jcdemarque à 11:58 - Commentaires […] - Permalien [#]

Tags: Hyper-V, Microsoft, Windows 2008, R2, memoire, memory, dynamic memory

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30 mars 2010

Dynamic Memory Coming to Hyper-V Part 2…

====================================================== Preamble: The point of this series, and the spirit in which it is written, is to take a holistic approach at the issues facing our customers, discuss the complexities with regard to memory management...

Posté par jcdemarque à 12:22 - Commentaires […] - Permalien [#]

Tags: Hyper-V, Microsoft, R2, coming, memoire, memory, dynamic memory

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18 mars 2010

Dynamic Memory Coming To Hyper-V

Virtualization Nation, I’ve had the pleasure of talking with customers in the last few months and the Hyper-V R2 reception has been nothing but unequivocally positive. Whether it’s been folks in small, medium or the enterprise, they appreciate the new...

Posté par jcdemarque à 20:29 - Commentaires […] - Permalien [#]

Tags: Hyper-V, Microsoft, R2, memoire, memory, dynamic memory, overcommit, soon

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11 mars 2010

Reclaiming idle memory

In the “CPU/MEM Reservation Behavior” article there was a lively discussion going on between Chris Huss(vmtrainers.com) and myself. I think the following comment by Chris more or less summarizes the discussion I wasn’t aware that the balloon driver was...

Posté par jcdemarque à 22:48 - Commentaires […] - Permalien [#]

Tags: ESX, VMWare, memoire, memory, balloon, reclaim, recuperation

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14 septembre 2009

Memory alarms triggered with AMD RVI and Intel EPT?

I’ve reported on this twice already but it seems a fix will be offered soon. I discovered the problem back in March when I did a project where we virtualized a large amount of Citrix XenApp servers on an AMD platform with RVI capabilities. As Hardware...

Posté par jcdemarque à 11:44 - Commentaires […] - Permalien [#]

Tags: VMWare, patch, vSphere, memoire, memory, alarm

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10 juin 2009

vSphere ESXi on a USB memory stick

The procedure has not changed much since ESXi 3.5 but I thought I would document it anyway. A lot of people seem to end up here by googling “USB ESXi vSphere”. Here you go: First get the following tools: 7-Zip (Free), WinImage (Demo) Download the ESXi...

Posté par jcdemarque à 13:56 - Commentaires […] - Permalien [#]

Tags: usb, Boot, esxi, vSphere, memory, stick

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19 mai 2009

Memory usage in vCenter Server 4.0

If you are using vCenter Server and plan on upgrading to vSphere you should be aware that vCenter Server 4.0 uses much more memory than vCenter Server 2.5 does. According to the official documentation for both 2.5 and 4.0, the system requirements are...

Posté par jcdemarque à 10:41 - Commentaires […] - Permalien [#]

Tags: vcenter, 4, memory, usage, vcenter 2.5

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21 avril 2009

Les limites mémoire dans Windows?

Après les limites de l’Active Directory déjà abordées par Jean-Hubert TALY (un des mes anciens collègues), je me suis aperçu que toutes ces limites sont assez mal connues et posent souvent des problèmes. Si on commence par Windows, la question peut paraître...

Posté par jcdemarque à 07:44 - Commentaires […] - Permalien [#]

Tags: Windows, limitation, limite, memoire, memory

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