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тАО11-03-2005 12:35 PM
тАО11-03-2005 12:35 PM
* Timezone Differential Factor is -25200
Can anyone tell me where the NTP client gets its time differential. The template file to set up the configuration is misleading in that the example for setting up UCX$NTP_TZ doesn't make sense. -40000 is not the number of seconds between UT and Boston in the summer. The logical name is not defined by the system.
Thanks for any help.
Ray
Solved! Go to Solution.
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тАО11-03-2005 06:28 PM
тАО11-03-2005 06:28 PM
Re: UCX - NTP and UTC time difference
look for the SYS$TIMEZONE_DIFFERENTIAL logical. If it's there you should see -25200 which is -7hours
It can be changed via SYS$MANAGER:UTC$TIMEZONE_SETUP.COM.
Mike
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тАО11-03-2005 08:23 PM
тАО11-03-2005 08:23 PM
Re: UCX - NTP and UTC time difference
UCX SET CONFIG TIME "..."
then do
UCX GENERATE TIME
to update the logicals and then restart your NTP server to pick up the result.
Purely Personal Opinion
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тАО11-03-2005 08:30 PM
тАО11-03-2005 08:30 PM
Re: UCX - NTP and UTC time difference
You must be running an old version of TCP/IP services for OpenVMS. The logical UCX$NTP_TZ is in hhmmss format. So -40000 means 4 hours behind UTC and 100000 means 10 hours ahead of UTC.
The logical sys$timezone_differential is in seconds. So -14400 is 4 hours behind UTC and 39600 is 11 hours ahead of UTC.
If a system has both of these logicals defined, UCX$NTP_TZ will be ignored
and SYS$TIMEZONE_DIFFERENTIAL will be used to define the time zone offset.
The timezone differential factor you showed is 7 hours behind UTC. If the real TDF is -8 hours, you can use UTC$TIME_SETUP to set up your timezone differential and your system time correctly.
Thanks and regards.
Michael
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тАО11-04-2005 05:11 AM
тАО11-04-2005 05:11 AM
Re: UCX - NTP and UTC time difference
I think that the SYS$TIMEZONE_DIFFERENTIAL logical will probably be the key. I ran the UTC$TIMEZONE_SETUP file and checked the logical and it did not change. I rebooted and it still did not change. I then tryied editing the UTC$TIMEZONE_SETUP.COM file and it appears that the data comes from binary files, one per unique time zone. I searched sys$manager:*.com for SYS$TIMEZONE_DIFFERENTIAL, but it is not defined there. I do get the correct answers on the screen for time zone and differences in hours. Perhaps there is something I missed. Or is there someplace where I could write a command file to look at the time and re-define SYS$TIMEZONE_DIFFERENTIAL after it gets defined by whatever generates the logical and before UCX$NTPD is started. How about in UCX$NTPD_STARTUP.COM? That, of course, does not handle running durring the time change (to/from DLS from/to standard)
Any help/hints would be appreciated.
Thanks
Ray
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тАО11-04-2005 08:46 AM
тАО11-04-2005 08:46 AM
Re: UCX - NTP and UTC time difference
Which version of OpenVMS are you running? Depending on the version and whether you are using DTSS, the source of the timezone differential may be different. It might be coming from sys$update$timezone_rules.dat or SYS$SYSROOT:[SYS$ZONEINFO.SYSTEM.SOURCES]NORTHAMERICA. (source for the timezones in North America, any change to it will need recompiling using ZIC).
Please post the output of
SHOW LOGICAL *TIME*
Thanks and regards.
Michael
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тАО11-04-2005 09:23 AM
тАО11-04-2005 09:23 AM
Re: UCX - NTP and UTC time difference
"CHS_TIME" = "MBA31:"
"DHS_TIME" = "MBA32:"
"SYS$LOCALTIME" = "SYS$SYSROOT:[SYS$ZONEINFO.SYSTEM.US]PACIFIC."
"SYS$TIMEZONE_DIFFERENTIAL" = "-28800"
"TIMEDATE_IS_DST" = "0"
Note that I made the change to the UCX$NTP_Startup.com to set the logical SYS$TIMEZONE_DIFFERENTIAL to the correct value. Without my changes it displays -25200.
Here is the version information on the system.
UCX> show version /all
Digital TCP/IP Services for OpenVMS VAX Version V4.1
on a VAXstation 4000-90 running OpenVMS V7.1
Thanks
Ray
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тАО11-04-2005 11:12 PM
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тАО11-04-2005 11:53 PM
тАО11-04-2005 11:53 PM
Re: UCX - NTP and UTC time difference
You are running V7.1 of OpenVMS and you have set your timezone to US/PACIFIC.
From the output of show logical *time*, you are not using DTSS.
You were running in daylight saving time before the last Sunday of October. Since you are using V7.1 and not using DTSS, there is no automatic TDF change made when daylight saving ended on Oct 30. Hence you have the problem of still having the TDF as -7.
So what you need to do is to use DAYLIGHT_SAVINGS.COM to perform the manual daylight saving change.
If you were using DTSS, then it can help you perform the automatic TDF change.
If you were using V7.3 or later, the sysgen parameter AUTO_DLIGHT_SAV also helps you with automatic TDF change.
Thanks and regards.
Michael
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тАО11-05-2005 12:41 AM
тАО11-05-2005 12:41 AM
Re: UCX - NTP and UTC time difference
The OP is using VAX - AUTO_DLIGHT_SAV is Alpha-only; never made it to VAX.