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тАО02-18-2008 05:19 AM
тАО02-18-2008 05:19 AM
Synchronize time
How can I synchronize the VMS time with a machine using windows time ?
Is it possible ?
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тАО02-18-2008 05:27 AM
тАО02-18-2008 05:27 AM
Re: Synchronize time
Synchronizing which way?
VMS = time source; or Windows = time source.
Both are possible via NTP.
Knowing nothing about Windows...
But for VMS check:
http://h71000.www7.hp.com/doc/83final/6526/6526pro_030.html#ntp_chap
Overhere, we use one of our VMSclusters as time source, and have the NTP server configured, and the Windows machines use NTP client software to synchronize their clocks.
Regards,
Kris (aka Qkcl)
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тАО02-18-2008 05:27 AM
тАО02-18-2008 05:27 AM
Re: Synchronize time
(recommended, have the VMS machine synch with one of the national time sources, and then have the Windows machine synch with the VMS host.)
Dave
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тАО02-18-2008 05:53 AM
тАО02-18-2008 05:53 AM
Re: Synchronize time
Thanks for your informations.
You recommend that I use the VMS to sync the windows system, but I need synch the VMS with the windows machine. I will have problems?
I don't know NTP service, but I will study about. It's easy to configure the NTP service in the VMS system.
best regards
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тАО02-18-2008 06:06 AM
тАО02-18-2008 06:06 AM
Re: Synchronize time
>>>
but I need synch the VMS with the windows machine. I will have problems?
<<<
Not as long as you define multiple time servers (3 is recommanded anyway), _AND_, you have a guarantee that at least one of those will be running at any time.
(then again, holes in available time server availability are acceptable, as long as they do not last longer as acceptable drift).
So, looks like you are ready to roll!
Success.
HTH
Proost.
Have on on me.
jpe
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тАО02-18-2008 07:08 AM
тАО02-18-2008 07:08 AM
Re: Synchronize time
If you need to sync against servers on the Internet, I would prefer to use my VMS box for one simple reason: security. I won't trust my Windows-based NTP service to be unhackable/unbreachable.
I use my VMS box to synch against a number of NTP sources on the internet and my PC's against the VMS box. In a number of years, my VMS box has no significant drift and the PC's sync out more than once in a day.
OpenVMS Developer & System Manager
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тАО02-18-2008 07:34 AM
тАО02-18-2008 07:34 AM
Re: Synchronize time
OpenVMS and other platforms have NTP clients, and NTP servers. The NTP server can be used by the Windows SNTP client.
You can use either to synchronize against a public NTP server, or you can run OpenVMS or another box with an NTP server and synch against that, or you can also acquire an external time-base (network) box that itself provides an NTP server.
Newer versions of Microsoft Windows may well have NTP servers now. If these issues have been worked out within the Microsoft (S)NTP platform, you may well be able to synchronize to these now.
The OpenVMS FAQ (http://www.hoffmanlabs.com/vmsfaq) has a "chapter" on time and timekeeping and NTP and related.
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тАО02-18-2008 05:47 PM
тАО02-18-2008 05:47 PM
Re: Synchronize time
As others have said, the answer to "Is it possible" is yes. But you haven't answered why you want to do that.
Why is it a requirement for the VMS time to be set to the PC time?
Do you really want someone changing the time on the PC to affect the VMS time?
If you don't want the PC's to set their time based on the VMS system, then use an external NTP server to set both, they will then be reasonably well synchronized.
Jon
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тАО02-19-2008 05:27 AM
тАО02-19-2008 05:27 AM
Re: Synchronize time
Thanks a lot for your considerations. Maybe it is better to think in using the VMS to sync the other Windows Servers. My VMS Servers have access and use more restricted.
I need to consider the possibility to use the VMS with a source time.
Best Regards