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From Alessandro Caviglione <c.alessan...@gmail.com>
Subject Re: Strange instance boot issue
Date Tue, 09 Dec 2014 12:09:20 GMT
Hi Geoff,
thank you for your tech suggest!
I think you're right, in fact changing compute offering to 1 GHz the server
boot up in 10 sec...
Thank you very much, also today I've learned something! :)

On Mon, Dec 8, 2014 at 10:42 AM, Geoff Higginbottom <
geoff.higginbottom@shapeblue.com> wrote:

> Hi Allesandro,
>
> This is just a hunch, but could it be that Windows only uses its 1st CPU
> to handle the boot process.  If this is the case when you allocate 4vCPU @
> 500Mhz it only has 500Mhz of CPU power to process the very intensive boot
> process, vs having 2000Mhz when you allocate a single vCPU @ 200MHz.
>
> I believe it's always better to provide a faster single vCPU than multiple
> Slower vCPUs as there are overheads on the Guest OS and Hypervisor when
> dealing with multiple vCPUs.
>
> Regards
>
> Geoff Higginbottom
>
> D: +44 20 3603 0542 | S: +44 20 3603 0540 | M: +447968161581
>
> geoff.higginbottom@shapeblue.com
>
> -----Original Message-----
> From: Alessandro Caviglione [mailto:c.alessandro@gmail.com]
> Sent: 08 December 2014 02:20
> To: users@cloudstack.apache.org
> Subject: Re: Strange instance boot issue
>
> Ok... maybe I found the issue!!
> Again... I'm learning CS in these month so you've to be patient with me!
> :) But this thing is strange...
> I configure some Compute offering setting CPU speed to 500 MHz and
> changing vCPU number for each offer, all the offerings are with CPU CAP
> enabled.
> Now, if I deploy a W2008R2 instance from a template or an ISO (yes....
> W2012 is working fine! :-/) with 4vCPU (4*500 MHz = 2 GHz) I get the
> issue... sloooooow boot time (about 15 mins).
> If I deploy the same instance with 1 vCPU with 2000 MHz, the instance boot
> in 7 sec!!
> Why???
>
> On Sun, Dec 7, 2014 at 1:49 AM, Alessandro Caviglione <
> c.alessandro@gmail.com> wrote:
>
> > Hi guys,
> > I'm sorry if I submit this problem, I honestly do not think it is a
> > fault of CloudStack, but I do not know where to look anymore ...
> > For several days (up to a week ago I did not have this problem) I have
> > trouble creating templates and run instances.
> > My infrastructure is composed of CS4.4.1 and 4 XenServer 6.2 hosts.
> > I want to point out that the problem is not due to poor storage
> > performance.
> > When I create an instance from an ISO, the installation time is
> > greatly increased.
> > When restarting the instances, for example windows VMs, they remain in
> > the boot about 30 minutes.
> > The strange thing is that when instances are started, the performances
> > are excellent!
> > What's even more strange is that trying to install a new VM directly
> > from XenServer, installation is fast and the boot issue when restart
> > the VMs does not appear and also boot is very fast (about 20/30 sec.)
> > In short, the problem seems to be only when the VMs are managed by
> > CloudStack.
> > I found this article and correct the BIOS of my server, even though I
> > had never encountered this problem until a week ago. (
> > http://support.citrix.com/article/CTX127395)
> >
> >
> > Someone can give me some guidance?
> >
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