VMware- Cluster Resource  utilisation

Posted on 2011-05-11
Last Modified: 2012-05-11
I have HA & DRS enabled cluster with below conf
No ESX host->2 (ESXi 4.1)
No of VM  -> 60
RAM / Host  ->98 GB
CPU / Host  ->2cpux2.66 Ghz and 6 cores per socket

1 I wants to know the overall utilisation of the cluster.
2 How many new VM that i can accomadate in the cluster

I have attached the "Advanced Run Time Info" screenshot over here.
Let me know how can i consolidate the utilisation with the help of Advanced Run Time Info"
 Advanced Run Time Info
Question by:kbjijo
    LVL 116

    Expert Comment

    by:Andrew Hancock (VMware vExpert / EE MVE)
    You best thing would be to look at some Capacity Management software:-

    Veeam Monitor

    But vKernel is the best Capacity Management software.

    All available as trial downloads for free, so you can do some capacity management for free for 30 days.
    LVL 116

    Expert Comment

    by:Andrew Hancock (VMware vExpert / EE MVE)
    This is what I wrote before when I compared the products, from this question

    and it's one of the biggest weaknesses of vCenter.

    Veeam Monitor and Reporter. Monitor and Reported are seperate programs. offers monitoring options and is the easiest to configure monitoring and alarms, it's the quickest product to get up and running quickly, however, it does not provide any customization which the Quest vFoglight product offers, but if there is a team of you, you will benefit from getting up and running with Veeam Monitor and Reporter, very quickly in your team with out reading manuals or requiring additional training. It has good capcity planning and reporting tools, I don't like the Reporting module, as it requires seperate installation, and database (but hey!). One thing that Veeam Monitor and Reporting lacks is optimization and trending tools.

    vFoglight has optimization and trending tools, but I going to recommend another product called vKernel.

    vKernel comes as a virtual applicance, it is the quickest to get up and running, and provides fanastic best trending and optimization to find misallocated and misconfigured resources, BUT it's the weakest at monitoring and alarming, and relies heavily on vCenter.

    So there you have it....

    1. Veeam Monitor and Reporter - Monitoring and Alarming, Capacity Planning.
    2. vKernel - Optimization and Trending (if you need it!)

    Author Comment

    shall i know how can i measure the availability with Run time info values.
    LVL 116

    Accepted Solution

    Okay, currently looking at your stats, you have 52 slots available, In simple terms a slot can be consumed by a single virtual machine, but a virtual machine may consume more than one slot!

    HA/DRS will not allow you to power on virtual machines, if you do not have enough resource in the cluster.

    For long term, what ifs' adding new machines in the future, vKernel is very good at providing this information and trends, so you will see when you run out of resource. Keep and eye on the Slots!

    Host Utilization Percentage Graph

    The host utilization graph, the top graph in the VMware DRS Resource Distribution section, is a histogram that shows the number of hosts on the Y axis and the utilization percentage on the X axis. If the cluster is unbalanced, you see multiple bars, corresponding to different utilization levels. The blue bars represent CPU usage and the orange represent memory usage.

    After the recommendation is applied the blue bars become closer to each other on the X axis. The closer the blue and orange bars are to each other, the more balanced the cluster is.

    What is the total memory and CPU in use for your cluster?

    I would really recommend the best HA and DRS resource on the internet

    VMware vSphere 4.1 HA and DRS Technical deepdive (Volume 1)

    it's also available as an ebook.

    Author Closing Comment


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