Solved

unbalanced cluster

Posted on 2014-09-02
3
340 Views
Last Modified: 2014-09-20
We have esxi5.1 host environment with 6 esxi host in a HA cluster and DRS enabled . Two of the exi host are old and thinking of replacing them soon.
These two  old esxi host has 98GB at each. I am thinning go replacing one of them with 256GB for now.
Will there be any issue on the cluster since the other esxi host has 6 cores and 98GB memory?
I  will appreciate if someone give me the theoretical explanation for it.
0
Comment
Question by:sara2000
3 Comments
 
LVL 8

Accepted Solution

by:
Wilder_Admin earned 167 total points
ID: 40300349
Nowadays the bottleneck is always ram. The cpu mostly are fast enough. Except you have cpu hungry applications running like cad or videostuff.

So you plan to take out one 98 GB and replace that one with a 256GB? If yes there is no problem coming up with. VMware is clever enough to handle this in your cluster.

So maybe you will have more vm then on the 256 machine and in a desaster case or service case VMware will move them to the rest of the cluster.

The reason why some consultant propagate to use the same HW is simple. The sideeffects are the same and you do not have to think about why is this or that not working. All the same HW is always a good decission but not important.

Again back to your question you can do it. Advice keep a track of free ressources in your cluster and you will be on the safe.
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 166 total points
ID: 40300379
It's always best to ensure, that ALL Hosts in the Cluster are identical.

But DRS will work out how many slots are available to distribute the VMs between hosts.
0
 
LVL 28

Assisted Solution

by:asavener
asavener earned 167 total points
ID: 40301249
Here's an article discussing some of the concerns with an unbalanced cluster:  http://www.yellow-bricks.com/2014/02/19/dont-create-frankencluster-just-can/
0

Featured Post

Connect further...control easier

With the ATEN CE624, you can now enjoy a high-quality visual experience powered by HDBaseT technology and the convenience of a single Cat6 cable to transmit uncompressed video with zero latency and multi-streaming for dual-view applications where remote access is required.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this article, I will show you HOW TO: Suppress Configuration Issues and Warnings Alert displayed in Summary status for ESXi 6.5 after enabling SSH or ESXi Shell.
This article outlines why you need to choose a backup solution that protects your entire environment – including your VMware ESXi and Microsoft Hyper-V virtualization hosts – not just your virtual machines.
Teach the user how to configure vSphere clusters to support the VMware FT feature Open vSphere Web Client: Verify vSphere HA is enabled: Verify netowrking for vMotion and FT Logging is in place or create it: Turn On FT for a virtual machine: Verify …
Teach the user how to use create log bundles for vCenter Server or ESXi hosts Open vSphere Web Client: Generate vCenter Server and ESXi host log bundle:  Open vCenter Server Appliance Web Management interface and generate log bundle: Open vCenter Se…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question