Live editing/tuning disk IOPS limits?

[Yenya (Jan "Yenya" Kasprzak)]

Hi all,

is it possible to tune parameters of a running VM, in particular DISK/WRITE_IOPS_SEC? I tried to update the VM template in Sunstone (VM →Conf →Update Configuration →Advanced, and then adding WRITE_IOPS_SEC = "50" to the DISK = [ ... ] section), but as long as I save the template, it remains unchanged.

This is probably related to this old thread:

Manage IOPs Limit for VMs

Hello, I’m running into trouble limiting the drive speed of the VMs. At the moment there are several VMs installed with no IOPs limit configured. Is there a possibility to set a global Limit to make sure that the VMs are running, on let`s say a maximum of 500 IOPs per VM? I have tried to change the Template, deattached the current storage from the VM, created a new VM with the new Template and attached the old Storage to the VM. After i have attached the old Storage the Limit is gone and th…

Thanks,

-Yenya

[pczerny (Pavel Czerny)]

Unfortunately, there is no option to update VM disk attributes, not even for powered-off VMs. The best you can do is detach the disk and attach it again with new attributes.