Rafael, Please see response in-line:
On 11/18/15 4:16 PM, Rafael Weingärtner wrote: > When you say 250+, you mean 250+ host spread in lots of cluster, right? > If I am not mistaken, ACS limits the number of KVM hosts in a cluster, > something like 50? I do not remember now if that value can be configured, > may it can be. Yes lots of clusters, way less than 50 per cluster. > I recall to have read something in a Red Hat doc about the KVM that it does > not have limit of hosts in a cluster. Actually, it does not seem to have > the figure of cluster at all. That is created solely in ACS, to facilitate > the management. > > To debug the problem, I would start with the following questions: > > Is every single cluster of your environment is presenting that problem? No, few clusters with some nodes within the cluster - not all. > What is the size of physical hosts that you have in your environment? Do > all of them have the same configuration? Yes, all hosts have the same configuration. Cant go into details, but its rather large. > Do you know the load (resource allocated and used) that is being imposed in > those hosts that had shown those problems? > What is your over commitment/provisioning factor that you are using? Servers are not heavily taxed, we dont over commit memory, other components could be over committed by 2 or less. Overall, we still have capacity to accommodate more VMs if needed, we just don't max it out. ---- Both Marcus and myself are looking through this, it could be just our specific implementation - hence, I wanted to see if anyone else in the community with heavy KVM usage came across this issue. Maybe I need to ping LeaseWeb and ExtremePC folks.. Thanks, ilya > > On Wed, Nov 18, 2015 at 8:19 PM, Daan Hoogland <daan.hoogl...@gmail.com> > wrote: > >> sounds like a bad limit Ilya, i'll keep an eye out. >> >> On Wed, Nov 18, 2015 at 10:10 PM, ilya <ilya.mailing.li...@gmail.com> >> wrote: >> >>> I'm curious if anyone runs ACS with atleast 250+ KVM hosts. >>> >>> We've been noticing weird issues with KVM where occasionally lots of KVM >>> agents get Nio connection closed issue followed by barrage of alerts. >>> >>> In some instances the agent reconnects right away and in other - it >>> attempts to reconnect but never receives an ACK from MS. >>> >>> Please let me know if you notice anything like it and if you found a >>> solution. >>> >>> Also, it would help to know what global settings have been tuned to make >>> things work better (aside from direct.agent.*) and how MS are running. >>> >>> Thanks >>> ilya >>> >> >> >> >> -- >> Daan >> > > >
