[SOLVED] syncronize clocks of two computers

Buddhike G · 01-02-2008, 05:51 AM

I want to syncronize the system time of two PCs with pricision upto a second. NTP too can do time syncronization as far as I know it dont syncronize them with a precision of a second.

does anybody knows a metod to overcome the problem ?

Thanx in advance !
Buddhike G

DotHQ · 01-02-2008, 06:04 AM

I thought if you use NTP using one of the servers as a time source it will sync them to the 1 second level. At least that is what I would try first. Have you tried this and seen more than a 1 second variance?

tronayne · 01-02-2008, 06:51 AM

NTP does sync to the second or better; if you want extreme or laboratory-level precision, you need a GPS or "radio" clock to use as a time source (and those babies run into the hundreds and up to the thousands of dollars). If you set NTP up to use three or so pool servers, it will sync to the "best" one on its own (if you generate the log you can see how things are going) and that may be good enough for your purposes; otherwise, radio is the way to go.

jtshaw · 01-02-2008, 07:13 AM

According to the NTP project... when syncing of a time source on a LAN the typical accuracy is less then a millisecond... over a WAN they claim a "few milliseconds" is typical. Ether-way, it is certainly the industry standard for accurate time sync and it should do well better then 1 second precision. As the other posters have said.. for critical applications I would recommend getting a GPS timesource that supports NTP and sync to that.

Buddhike G · 01-02-2008, 09:30 PM

Oh ! I'm sorry, I was wrong about the NTP server, anyway now what i want to do is sync 2 PCs without any external reference. where one PCs system time as the NTP server and the other PC as client. Is it possible ?
Thanx for any help !
Buddhike G

jlinkels · 01-03-2008, 05:46 AM

Yes, that will work as well. You can sync your server to NTP, if it cannot sync because you are lacking a connection it does not sync. You client machine however will sync to your server anyway.

jlinkels