Solved

HA VM failover question

Posted on 2013-05-13
5
242 Views
Last Modified: 2013-05-13
I have a HA setup with 4 blades (hosts) right now.

I have 1 VM (Called VM A) on one blade that uses a lot of resources.

None of the other hosts (blades) in the cluster have available resources matching what VM A uses

So my question is this, if VM A has to fail over will it still fail over to another host but run with limited resources or will it just not fail over?
0
Comment
Question by:iamuser
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
5 Comments
 
LVL 120

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39161997
By Default it WILL NOT Fail-Over, unless you change the Cluster HA Settings, otherwise you will get an error message, stating not enough resources.

if you want to failover, but with klimited resources

Disable vSphere HA admission control.

you will receive the following error message

Insufficient resources to satisfy HA failover level on cluster

see here

http://pubs.vmware.com/vsphere-50/index.jsp?topic=%2Fcom.vmware.vsphere.avail.doc_50%2FGUID-53F6938C-96E5-4F67-9A6E-479F5A894571.html

http://www.yellow-bricks.com/2012/12/04/insufficient-resources-to-satisfy-ha-failover-level-on-cluster/
0
 

Author Comment

by:iamuser
ID: 39162008
so if i change the cluster HA settings the VM will failover but just run slower
0
 
LVL 120

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 39162017
Correct.

but be careful, and use common sense, if you have a VM which requires 64GB of memory, and your host only has 8GB, it will run very very slowly! (and probably fail!)

Ideally all hosts would be roughly equal!
0
 

Author Comment

by:iamuser
ID: 39162127
great thanks for the clarification
0
 
LVL 120
ID: 39162353
No problems!
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

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.
Is your company's data protection keeping pace with virtualization? Here are 7 dynamic ways to adapt to rapid breakthroughs in technology.
Teach the user how to install log collectors and how to configure ESXi 5.5 for remote logging Open console session and mount vCenter Server installer: Install vSphere Core Dump Collector: Install vSphere Syslog Collector: Open vSphere Client: Config…
Teach the user how to join ESXi hosts to Active Directory domains Open vSphere Client: Join ESXi host to AD domain: Verify ESXi computer account in AD: Configure permissions for domain user in ESXi: Test domain user login to ESXi host:

733 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