who can help me with "insufficient resources to meet the level of failover configured for vSphere HA.

Hello world

We tried to gif a 14GB of ram and make server complete a booking for her.
This is a server for the exams and the vendor told us to do.

I can't any more then 5500MB reservation on it, when I anymore that I get
"Insufficient resources to meet the level of failover configured for vSphere HA.

We have:

2 X 5.1 ESXi hosts
Each host has
2 x processors (8 Cores each) with HT active.
255,75 GB of Ram

vSphere HA has been activated.
Admission control policy is enabled and that the ability to failover is 1 host.

What is the problem here?

Thank you
Ernst.


Admission control policy is all about to give you the kind of guarantee that if the host failure happens then there will be enough resources to perform the successful failover.

in simple terms, it comes to reserve the resources of failover.

I would recommend going through the notion of vSphere HA, reduced control policy the following document.

https://pubs.VMware.com/vSphere-60/topic/com.VMware.ICbase/PDF/vSphere-ESXi-vCenter-Server-60-availability-Guide.PDF

From the Page number 22, the details that you need to study is given. Focus especially on part calculations Slot size of it.

in your case you HA vSphere with number of failure of host to tolerate as admission control strategy defined.

This means system will calculate CPU and memory slots out of the resources in your cluster, and the total number of units, it will keep some resources like reserved for failover, and others will be available to be used. It all depends on how much failure of hosts that you want to tolerate.

now in your case, if you try to increase booking one of the virtual machine, which will then affect the number of locations in your environment, and so reserved ability to failover is violated, the system will not let you do what you want to do. As the energy on a virtual machine, or growing booking a powered VM etc..

If you find that you have enough resources in your cluster and due to some virtual machines with very large cpu or memory reservation, number of places is less than you can still manage the settings some advanced in vSphere HA configuration, but I strongly recommend, try to take the help of someone who has done it before.

also try to go through other admission control strategies which are explained in the document for more inputs.

Tags: VMware

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