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Re: KVM Max Guests Limit


Do we need these logical constraints in ACS at all?

On Fri, Nov 9, 2018 at 6:57 AM Wido den Hollander <wido@xxxxxxxxx> wrote:

>
>
> On 11/8/18 11:20 PM, Simon Weller wrote:
> > I think these is legacy and a guess back in the day. It was 50 at one
> point and it was lifted higher a few releases. ago.
> >
>
> I see. I'm about to do a test with a bunch of 128GB hypervisors and
> spawning a lot of 128M VMs. Trying to see where the limit might be and
> also stress the VR a bit by loading a lot of DHCP entries.
>
> Wido
>
> >
> >
> >
> > ________________________________
> > From: Ivan Kudryavtsev <kudryavtsev_ia@xxxxxxxxx>
> > Sent: Thursday, November 8, 2018 3:58 PM
> > To: dev
> > Subject: Re: KVM Max Guests Limit
> >
> > Hi all, +1 for higher numbers.
> >
> > чт, 8 нояб. 2018 г. в 16:32, Wido den Hollander <wido@xxxxxxxxx>:
> >
> >> Hi,
> >>
> >> I see that for KVM we set the limit to 144 guests by default, can
> >> anybody tell me why we have this limit set to 144?
> >>
> >> Searching a bit I found this:
> >> https://access.redhat.com/articles/rhel-kvm-limits
> >>
> >> "This guest limit does not apply to Red Hat Enterprise Linux with
> >> Unlimited Guests. There is no guest limit for Red Hat Enterprise
> >> Virtualization"
> >>
> >> There is always a limit somewhere, but why do we set it to 144?
> >>
> >> I would personally vote for increasing this to 500 or something so that
> >> users don't run into it that easily.
> >>
> >> Also, the log line is printed in DEBUG mode only when a host reaches
> >> this limit, so I created a PR to set this to INFO:
> >> https://github.com/apache/cloudstack/pull/3013
> >>
> >> Any input?
> >>
> >> Wido
> >>
> >
> >
> > --
> > With best regards, Ivan Kudryavtsev
> > Bitworks LLC
> > Cell RU: +7-923-414-1515
> > Cell USA: +1-201-257-1512
> > WWW: http://bitworks.software/ <http://bw-sw.com/>
> >
>


-- 
Rafael Weingärtner