[mailto:questions-bounces+bob.horvath=motorolasolutions@lists.ntp.org]
On
Behalf Of Rob
Sent: Thursday, September 19, 2013 11:20 AM
To: questions@lists.ntp.org
Subject: Re: [ntp:questions] R: Re: debugging strange ntp in virtual
environment
Horvath Bob-BHORVAT1 bob.horv
On 2013-09-19, Riccardo Castellani ric.castell...@alice.it wrote:
I converted physical machine to virtual one, where there is NTPd service.
My
ESX host is running several guest OS included this NTP server.
Can it be this
one the problem ? Virtualization ? I'd like to know if ntpd adjusts
On 19/09/13 06:41, Riccardo Castellani wrote:
one the problem ? Virtualization ? I'd like to know if ntpd adjusts only OS
time or it adjust hardware clock too.
ntpd only adjusts the software clock, however, the guest OS may well try
to update the hardware clock. Normal VM hosts will
David Woolley wrote:
The basic problems with running ntpd on VMs are that
simulated real time
can run at variable rates, compared with true real time,
and there can
be large scheduling delays, which compromise the accuracy of
offset measurement.
What means simulated real time can run at
Riccardo Castellani ric.castell...@alice.it wrote:
I converted physical machine to virtual one, where there is NTPd service.
My
ESX host is running several guest OS included this NTP server.
Can it be this
one the problem ? Virtualization ? I'd like to know if ntpd adjusts only OS
time or
] R: Re: debugging strange ntp in virtual
environment
Riccardo Castellani ric.castell...@alice.it wrote:
I converted physical machine to virtual one, where there is NTPd service.
My
ESX host is running several guest OS included this NTP server.
Can it be this
one the problem
Horvath Bob-BHORVAT1 bob.horv...@motorolasolutions.com wrote:
Please read the knowledge base article on the VMware site for a full
explanation of how it works and what you can configure.
I think the confusing aspect to many is that the recommendations from VMware
are to run NTP on the guests
: [ntp:questions] R: Re: debugging strange ntp in virtual
environment
Horvath Bob-BHORVAT1 bob.horv...@motorolasolutions.com wrote:
I think the OP is saying that what they used as their stratum x time
source just got virtualized. So what works then?
1) Having the guests pointed to where the newly
:20 AM
To: questions@lists.ntp.org
Subject: Re: [ntp:questions] R: Re: debugging strange ntp in virtual
environment
Horvath Bob-BHORVAT1 bob.horv...@motorolasolutions.com wrote:
I think the OP is saying that what they used as their stratum x time
source just got virtualized. So what works
]
On
Behalf Of Rob
Sent: Thursday, September 19, 2013 11:20 AM
To: questions@lists.ntp.org
Subject: Re: [ntp:questions] R: Re: debugging strange ntp in virtual
environment
Horvath Bob-BHORVAT1 bob.horv...@motorolasolutions.com wrote:
Why?
What we have is a similar situation, we had a physical
, September 19, 2013 11:20 AM
To: questions@lists.ntp.org
Subject: Re: [ntp:questions] R: Re: debugging strange ntp in virtual
environment
Horvath Bob-BHORVAT1 bob.horv...@motorolasolutions.com wrote:
Why?
What we have is a similar situation, we had a physical machine providing ntp
service
What means simulated real time can run at variable rates
?!
This is explained in one of the early VMWare white papers on timing (at
the time they were recommending using VMWare Tools to control the guest
time and synchronising the host. There seem to have been changes since,
but I
=motorolasolutions@lists.ntp.org]
On
Behalf Of Rob
Sent: Thursday, September 19, 2013 11:20 AM
To: questions@lists.ntp.org
Subject: Re: [ntp:questions] R: Re: debugging strange ntp in virtual
environment
Horvath Bob-BHORVAT1 bob.horv...@motorolasolutions.com wrote:
Why?
What we
I converted physical machine to virtual one, where there is NTPd service.
My
ESX host is running several guest OS included this NTP server.
Can it be this
one the problem ? Virtualization ? I'd like to know if ntpd adjusts only OS
time or it adjust hardware clock too.
In latter case if it
This NTP server is a virtual machine (by P2V) but few months ago it was
working fine.
Time control on a virtual machine is in general terrible. You
should be
having the underlying OS running ntp and having your virtual OS
getting
the time from that underlying OS.
So ntpd service, which gives
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