Re: storagedriver domain limited to 61 "shares" - Xen 4.16.6 pre2

[Juergen Gross <jgross@xxxxxxxx>]

On 12.02.24 08:40, J. Roeleveld wrote:
> On Monday, February 12, 2024 8:09:35 AM CET Juergen Gross wrote:
> > On 12.02.24 07:57, J. Roeleveld wrote:
> >
> > > On Monday, February 12, 2024 7:40:39 AM CET Juergen Gross wrote:
> > >
> > > > On 11.02.24 17:21, J. Roeleveld wrote:
> > > >
> > > >
> > > > You can raise the default of 1000 nodes per domain (how to do that
> > > > depends
> > > > on the Xenstore type you are running, xenstored or oxenstored).
> > >
> > > Hi Juergen,
> > >
> > > Many thanks for this. I forgot I already raised this in the past to 10000
> > > on  the host and the current amount of entries is quite close to this
> > > limit: # xenstore-ls | wc -l
> > > 9590
> > >
> > > I will increase this and try again when I have a chance to reboot the
> > > host.
> > Which version of Xen are you running?
> I am currently using 4.16.6_pre2
>
> > In case it is not too old (>4.15), you could try to restart xenstored via
> > live update giving it the new parameters. Note that this feature is still
> > "Tech Preview", but there are no issues I'm aware of. In dom0 you'd do:
> >
> >     xenstore-control live-update -c '<new parameters>' /usr/sbin/xenstored
> Considering that restarting of VMs fails once I hit this issue, I prefer to
> test when I am able to reboot the host anyway. :)
>
> > > Is there any benefit of using "oxenstored" over "xenstored" ? I currently
> > > use  "xenstored" and apart from this, don't seem to have any issues.
> > I'm biased, as I'm the maintainer of "xenstored". :-)
> Understandable. Reason I am asking is because "oxenstored" seems new to me as
> I didn't hear about it till now. Was wondering if that is going to replace
> "xenstored" eventually.
>
> > BTW, oxenstored has the same default of 1000 nodes per domain.
> There is one thing that confuses me about this.
>
> I notice the limit is applied to the entire host, not per domain.
The limit is a global one being applied to each domain (except dom0), but there
are plans to make all Xenstore quota configurable per domain.

> The entire xenstore-ls output gives me 9k+ entries. This is with 15 domU's.
> On average, I should stay below 1k nodes per domain.
"On average" doesn't really help here. :-)

> Unless "domain" in this context is not a Virtual Machine ?
It is.


Juergen

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