[vbox-dev] Linux Host VM Cap?

[Zak Perschon]

Ah, sorry forgot to include the original support thread. The limit I hit was 128 active VMs at once. Once I hit that number, I was unable to launch any more unless I stopped one that was already running. My original thread can be found here (though there is little information contained in it): http://forums.virtualbox.org/viewtopic.php?f=7&t=40955

-Zak

> Date: Fri, 29 Apr 2011 16:25:44 +0200
> From: klaus.espenlaub at oracle.com
> To: vbox-dev at virtualbox.org
> Subject: Re: [vbox-dev] Linux Host VM Cap?
> 
> On 25.04.2011 18:00, Zak Perschon wrote:
> >
> > I've come across what is seemingly a hard cap for the amount of
> > concurrent VMs I can run on a Linux based machine (after posting on the
> > support forums, I was directed here). Apparently this same cap was
> > encountered on a solaris host and a fix was deployed to increase the
> > amount of VMs that were allowed to run at the same time. Was this fix
> > supposed to be included in other OS releases? Any information on this
> > would be greatly appreciated.
> 
> That's a rather vague statement, and if you could tell what number of 
> concurrently running VMs you can achieve I might be able to infer what 
> limit is causing trouble for you.
> 
> It could be the SysV semaphore count, the number of open files per 
> process, and so on. All these defaults depend on the kernel 
> configuration and/or distribution, so it's hard to generalize.
> 
> Solaris is easy compared to that, as it is very uniform compared to Linux.
> 
> Klaus
> 
> >
> > Here is the information on the hardware/VM profiles I am using
> >
> > Host Machine:
> > 128 Processor Cores (64 dual core Xenon processors running at 2.27 GHz)
> > 2.0 TB Memory (1.8~ Usable)
> > 1.8 TB RAID 0 (6 x 300GB HDD running at 10k RPM)
> > 16TB SAS
> >
> > VM Profile
> > Compiled TinyCore Linux 2.6
> > Required Memory: 150~MB
> > Required HDD Space: 50MB
> >
> > -Zak
> 
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