Solved: Cluster Design : Metrics to use Memory Active or M...

felakkad · ‎02-01-2016

Hi Guys

Real Life Design (Memory Calculation) :

Do you think we can use the Active Memory in perf metrics to calculate the VM need ?

Or i have to use tools like perfmom.

The case is that we have 150 VMs in an Olds servers hardware, we want built a new cluster with new servers. I need to know how much memory consumption in the whole cluster

If I take the Active memory Averge of the all the VM (exemple : 100Gb RAM) + an extra 30 % (for peak : 30Gb) + 20% (For VMkernel : 20Gb)

Memory need : 150Go

Because In the Perf properties I see the Consumed Memory 10 Times higher than the Active memory. If i choose to design from the the consumed Metrics i affraid to have too much lost

And What about the ratio vCPU/pCore with the new CPU 8-9 vCPU/pCore si good choice for you ?

Thanks for your help

DavoudTeimouri · ‎02-01-2016

Hi friend,

It's depended to your machines and services which will be run on the machines. If your environment is sensitive, for example:

You have SQL server, Oracle server as virtual machine, you need to guaranteed memory resources and "Consumed" memory metric is better for resource calculating.

About CPU, it's like memory calculation and it's depended to your environment and the machines. If you want deploy virtual desktop and you have any voip application like Lync and ... , CPU ratio must be 1:2 (Physical:Virtual) and 1:3 is also good.

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Davoud Teimouri - https://www.teimouri.net - Twitter: @davoud_teimouri Facebook: https://www.facebook.com/teimouri.net/

View solution in original post

DavoudTeimouri · ‎02-01-2016

Hi friend,

It's depended to your machines and services which will be run on the machines. If your environment is sensitive, for example:

You have SQL server, Oracle server as virtual machine, you need to guaranteed memory resources and "Consumed" memory metric is better for resource calculating.

About CPU, it's like memory calculation and it's depended to your environment and the machines. If you want deploy virtual desktop and you have any voip application like Lync and ... , CPU ratio must be 1:2 (Physical:Virtual) and 1:3 is also good.

-------------------------------------------------------------------------------------
Davoud Teimouri - https://www.teimouri.net - Twitter: @davoud_teimouri Facebook: https://www.facebook.com/teimouri.net/

vThinkBeyondVM · ‎02-01-2016

Below 2 blogs I had written some time back and it will be very good read for you to understand How DPM/DRS considers memory metric etc.

1. http://vthinkbeyondvm.com/part-1-vmware-dpm-vs-esxi-memory-ballooning/

2. http://vthinkbeyondvm.com/part-2-vmware-dpm-vs-esxi-memory-ballooning/

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felakkad · ‎02-02-2016

Hey Guys thanks for you response

And Help..

I am gone have a look on the Map Tool, it's a free tool that monitor ressources.

The probleme with the Memory Consumed is that, this is all the memory pages Touched since the VM booted, and some of them have an uptime for more than 500days.

I am gone make an average beetween Active and Consumed

All

Cluster Design : Metrics to use Memory Active or Memory Consumed