Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-10 Thread unruh
On 2012-08-09, E-Mail Sent to this address will be added to the BlackLists wrote: > unruh wrote:> David Woolley wrote: >>> Steve Kostecke wrote: What will happen when ntpd is started has been discussed elsewhere in this thread. >>> >>> If you want to clear a very large error by a pure

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-09 Thread David Woolley
E-Mail Sent to this address will be added to the BlackLists wrote: unruh wrote:> David Woolley wrote: Steve Kostecke wrote: What will happen when ntpd is started has been discussed elsewhere in this thread. If you want to clear a very large error by a pure slew, the best way is not to start

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-09 Thread E-Mail Sent to this address will be added to the BlackLists
unruh wrote:> David Woolley wrote: >> Steve Kostecke wrote: >>> What will happen when ntpd is started has been discussed >>> elsewhere in this thread. >> >> If you want to clear a very large error by a pure slew, >> the best way is not to start ntpd until you have cleared >> the error, but, inst

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-09 Thread unruh
On 2012-08-08, Rob wrote: > unruh wrote: >> On 2012-08-08, Rob wrote: >>> Harlan Stenn wrote: If this situation is "difficult" for you I'd recommend you get an inexpensive GPS receiver and use that to sync your master machine(s). Check out the Sure Electronics GPS board, whi

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-09 Thread unruh
On 2012-08-08, Harlan Stenn wrote: > unruh writes: >> On 2012-08-08, Arpith Nayak wrote: >> > I have a server that is in the orphan mode i.e. it was not connected to the >> > internet (and thus the various public NTP servers) when I booted it up. Now >> > if I install ntpd oin this server and run

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-09 Thread unruh
On 2012-08-08, David Woolley wrote: > Steve Kostecke wrote: > >> >> What will happen when ntpd is started has been discussed elsewhere in >> this thread. >> > > If you want to clear a very large error by a pure slew, the best way is > not to start ntpd until you have cleared the error, but, ins

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-09 Thread David Woolley
Steve Kostecke wrote: On 2012-08-08, David Woolley wrote: Steve Kostecke wrote: What will happen when ntpd is started has been discussed elsewhere in this thread. If you want to clear a very large error by a pure slew, the best way is not to start ntpd until you have cleared the error, but,

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Steve Kostecke
On 2012-08-08, David Woolley wrote: > Steve Kostecke wrote: > >> What will happen when ntpd is started has been discussed elsewhere in >> this thread. > > If you want to clear a very large error by a pure slew, the best way > is not to start ntpd until you have cleared the error, but, instead, >

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Richard B. Gilbert
On 8/8/2012 6:56 AM, Arpith Nayak wrote: I have a server that is in the orphan mode i.e. it was not connected to the internet (and thus the various public NTP servers) when I booted it up. Now if I install ntpd oin this server and run it, will the first instance of ntpd cause a sudden change in t

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread David Woolley
Harlan Stenn wrote: If you override this in the ntp.conf file (or via a startup option) it will slew the time gradually, but realize it may take a *very* long time to get the clock right. This type of change is applied at 500ppm, so a change of 1 second will be applied over 2000 seconds. Als

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread David Woolley
Steve Kostecke wrote: What will happen when ntpd is started has been discussed elsewhere in this thread. If you want to clear a very large error by a pure slew, the best way is not to start ntpd until you have cleared the error, but, instead, to use whatever utility your OS uses to access

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Harlan Stenn
unruh writes: > On 2012-08-08, Arpith Nayak wrote: > > I have a server that is in the orphan mode i.e. it was not connected to the > > internet (and thus the various public NTP servers) when I booted it up. Now > > if I install ntpd oin this server and run it, will the first instance of > > ntpd c

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Harlan Stenn
Rob writes: > Harlan Stenn wrote: > > If this situation is "difficult" for you I'd recommend you get an > > inexpensive GPS receiver and use that to sync your master machine(s). > > > > Check out the Sure Electronics GPS board, which can be easily modified > > to provide a PPS signal. There are o

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread unruh
On 2012-08-08, Rob wrote: > Harlan Stenn wrote: >> If this situation is "difficult" for you I'd recommend you get an >> inexpensive GPS receiver and use that to sync your master machine(s). >> >> Check out the Sure Electronics GPS board, which can be easily modified >> to provide a PPS signal. T

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread unruh
On 2012-08-08, Arpith Nayak wrote: > I have a server that is in the orphan mode i.e. it was not connected to the > internet (and thus the various public NTP servers) when I booted it up. Now > if I install ntpd oin this server and run it, will the first instance of > ntpd cause a sudden change in

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Steve Kostecke
On 2012-08-08, Arpith Nayak wrote: > I have a server that is in the orphan mode i.e. it was not connected to the > internet (and thus the various public NTP servers) when I booted it up. Now > if I install ntpd oin this server and run it, will the first instance of > ntpd cause a sudden change in

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Rob
Harlan Stenn wrote: > If this situation is "difficult" for you I'd recommend you get an > inexpensive GPS receiver and use that to sync your master machine(s). > > Check out the Sure Electronics GPS board, which can be easily modified > to provide a PPS signal. There are other inexpensive GPS uni

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread David Taylor
On 08/08/2012 12:20, Harlan Stenn wrote: [] Check out the Sure Electronics GPS board, which can be easily modified to provide a PPS signal. There are other inexpensive GPS units as well. H If it helps, my notes on using the Sure Electronics board are here: http://www.satsignal.eu/ntp/Sure-

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Harlan Stenn
Arpith Nayak writes: > What is the corresponding property I need to add in the .conf file to > cause a gradual sync of time with the public NTP server and not a > sudden "step"? I'm going to take the easy way out because it's 0415 here and I need to fall asleep... I'd recommend you look at the do

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Dave Hart
On Wed, Aug 8, 2012 at 11:07 UTC, Arpith Nayak wrote: > What is the corresponding property I need to add in the .conf file to cause > a gradual sync of time with the public NTP server and not a sudden "step"? http://www.eecis.udel.edu/~mills/ntp/html/miscopt.html#tinker See the "tinker step" opti

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Arpith Nayak
What is the corresponding property I need to add in the .conf file to cause a gradual sync of time with the public NTP server and not a sudden "step"? Regards, Arpith On Wed, Aug 8, 2012 at 4:33 PM, Harlan Stenn wrote: > Arpith Nayak writes: > > I have a server that is in the orphan mode i.e. i

Re: [ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Harlan Stenn
Arpith Nayak writes: > I have a server that is in the orphan mode i.e. it was not connected to the > internet (and thus the various public NTP servers) when I booted it up. Now > if I install ntpd oin this server and run it, will the first instance of > ntpd cause a sudden change in the system time

[ntp:questions] Does NTP cause an abrupt/sudden change in an orphan's system time?

2012-08-08 Thread Arpith Nayak
I have a server that is in the orphan mode i.e. it was not connected to the internet (and thus the various public NTP servers) when I booted it up. Now if I install ntpd oin this server and run it, will the first instance of ntpd cause a sudden change in the system time as well as timestamps or doe