jumebv

My personal adventures in the quest for virtual perfectness.

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Posted on

I got a question from @repping yesterday which got me thinking. His question was: "Do you know a good site where I can find memory prices for enterprise hardware.". Later it became clear he wanted to use that price to calculate chargeback for memory. He wanted to know the amount/GB. My fist reaction was: well, looking at the total amount of memory in combination with certain size DIMMs - the price rises with larger and larger DIMMs.

I think Dell uses a quite transparent site, with reasonable prices. Let's take a typical server, an R720 which can hold 2 XEONs and hold 24 DIMMs. Here is a table with the current price at time of writing this post:

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Tagged in: chargeback memory
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Recent comment in this post - Show all comments
  • Bouke Groenescheij says #
    Hi Hugo, Thank you very much on your comment and I agree: "Keep it simple". And I really like your view on filling up resources,

Posted on

Mr. @esloof did a nice tweet about this one and caught my attention. It's a very nice diagram in pdf format showing the memory management for vSphere 5. The thing I like best is the way it is set up: screenshot from esxtop, vSphere client and very clear mapping of virtual memory into physical memory. I'm printing it on A2 and stick it onto a wall and look at it from time to time. I suggest you do the same Cool. Check it out here.

2017642 vSphere5-Memory-Management-and-Monitoring-Diagram-v1-2

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Posted on

This post is just a reminder for me - however, there might be a thing or two for you to pick up too...

Take a look at the image below (you can click it to enlarge):

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Last modified on
Recent Comments - Show all comments
  • Super User says #
    is it a kind of software?
  • Bouke Groenescheij says #
    Hey Viktor, thanks for the feedback - also: keep 'm coming!

Posted on

I received a link to this: VMware Technical Journal. Also @duncanyb also blogged about this one already. However, I want to stress how cool this document actually is!

Like: did you know VMware developed a tool called vmtar. A normal TAR is unaligned and vmtar makes sure the files inside the tar are aligned. Why do we care? Well, as the tar holding the core which makes ESXi tick are loaded into memory, some 'writable' files are copied to ramdisk. So the ramdisk and the tar are both in memory and somewhat the same. And there we have Transparent Page Sharing, optimizing the memory. If we didn't had vmtar, the tar files would be unaligned and TPS wasn't so effective - however, thanks to vmtar, TPS is more effective, saving more memory.

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Tagged in: technical vSphere
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Posted on

I got this nice question from my colleague last week:

We have cloned a VM, but I want to prevent the original from being started. Also when we do a failover to an other datacenter - I do not wan't this VM to be started.

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Tagged in: templates VM
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Posted on

Hi all,

I've just updated my complete site. I wasn't really happy with the whole template so it was time for me to update it. I also updated the BLOG section, filtered out relevant articles and upgraded the joomla back-end to the latest version. Overall, I'm very satisfied.

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Posted on

Last Friday I was at the DutchVMUG in the NBC Nieuwegein, the Netherlands. The DutchVMUG is a large (700+) VMware Usergroup event. During this event you'll get great speakers in 4 parallel sessions, the ability to do workshops, visit awesome sponsors and meet peers in the industry. My experiences were just plain awesome. I had a GREAT day. I was invited to do a presentation and since I was involved in implementing and maintaining a large VMware View environment I thought: "Why not share my knowledge to the community?". So I created a little presentation in Prezi, my favorite presentation tool and called it: VMware View in the Enterprise. But, first things first...

bloggers

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