VMware

This Question is Possibly Answered

1 "correct" answer available (10 pts) 2 "helpful" answers available (6 pts)
1 2 Previous Next 19 Replies Last post: May 19, 2008 5:49 PM by bemisVmwareLi…   Go to original post

Re: Insufficient resources to satisfy HA

15. Apr 2, 2008 7:04 PM in response to: garybrown
Click to view VMechanic's profile Lurker
VMechanic
3 posts since
Mar 17, 2008

I noticed similar issues after upgrading to VC2.5 and ESX 3.5. Our equipment which had been properly spec'd for future growth suddenly was incapable of supporting HA on existing VM load.

We are running four Dell 6950s each with 32Gb memory and Quad Dual-core Opteron CPUs. From what I can tell, HA is being overly conservative in relation to memory since I can decrease memory allocations and failover capacity will be happy again. What I don't understand is... We have 128Gb of pooled RAM. If a host drops there will be 96Gb in the pool. We currently have 22 VMs so if you divide up the 96Gb of memory equally, they should all have 4Gb each. The allocations I have set are nowhere close to that. If I calculate our current memory allocations we are sitting at about 42Gb in total. I realise ESX will take some memory for itself but I didn't think it created this much overhead. That's 54Gb of memory that has disappeared into the ether! I assume it is not taking into account any VMs that are powered off?

Please explain?!?!

Re: Insufficient resources to satisfy HA

16. Apr 3, 2008 2:57 PM in response to: VMechanic
Click to view eziskind's profile Expert
eziskind
310 posts since
Feb 21, 2006
Do you have vms in your cluster with different numbers of virtual cpus? As mentioned above, the HA admission control algorithm is more (ok, excessively) conservative in such cases to try and avoid resource fragmentation. We'll be addressing this problem in a future release.

Re: Insufficient resources to satisfy HA

17. Apr 3, 2008 6:30 PM in response to: eziskind
Click to view VMechanic's profile Lurker
VMechanic
3 posts since
Mar 17, 2008

Yes, there are 2 VMs that are running with 2 CPUs (out of necessity) the rest are all single. It does sound a little like a bug if it is requiring extra 10s of Gbs of memory to cope with such a situation. By "future release" do you mean a hotfix update or are we talking next major version?

I assume HA will still function correctly even if it shows no host failure tolerance?

Re: Insufficient resources to satisfy HA

18. Apr 3, 2008 6:35 PM in response to: VMechanic
Click to view eziskind's profile Expert
eziskind
310 posts since
Feb 21, 2006
It would help if you could move those 2 vms to a different cluster, but I understand that might not be feasible. Not sure exactly which release this will make it into, but it should be before the next major release. And yes, HA will still function correctly even if HA admission control says there is not enough resources. When failovers happen they only take into account the actual resources required by vms and the resources available on the host, not the conservative algorithm of HA admission control.

Re: Insufficient resources to satisfy HA

19. May 19, 2008 5:49 PM in response to: eziskind
Click to view bemisVmwareLicensing's profile Novice
bemisVmwareLi…
2 posts since
Sep 29, 2006

Is there an ETA on a "fix"?

Onsite, I have just had the fortune to be able to "redo" most of my hosts. I now have

  • 7 (seven) HP DL385 servers in one cluster that has 28 total processors, 61GHz of processors, and 111Gb of RAM) for 51 virtual machines
- Of the 51, I have 25 which are dual vCPU and 26 single.
- My HA on this cluster is 2 (Awesome!)

  • 6 (seven) HP DL585G5 servers (3 are quad quad-core, 6 are dual duad core (72 Processors), total of 159GHz of proc, and 420GB of RAM) for 63 virtuals
- Of the 63, 30 are single vCPU, 28 are dual vCPU, and 5 are quad vCPU
- My HA on this cluster is 0 (BYTES!!!!)
- I have had 1 of the quad quad core hosts down, I have also had all 3 of the dual quad core hosts down and HA does NOT change...

I am VERY frusterated!

1 2 Previous Next Go to original post

Actions

VMware Developer

SDKs, APIs, Videos, Learn and much more in the Developer community.

Learn More

Developer Sample Code

Increase your developer productivity with VMware API sample code.

Learn More

VMworld Sessions & Labs

Online access to the latest VMworld Sessions & Labs and online services.

Learn more

Purchase PSO Credits Online

Purchase credits to redeem training and consulting services online.

Buy Now

Community Hardware Software

View reported configurations or report your own.

Learn More

VMware vSphere

Come witness the next giant leap in virtualization.

Register Today

Communities