cancel
Showing results for 
Search instead for 
Did you mean: 

Daylight savings

 

Daylight savings

I have a few 11.23 itanium servers that were setup in April with newer releases of 11.23 - Do you know if I need any patches for Daylight Savings..

Also if I have an ntp server - will my systems automatically change
3 REPLIES
James R. Ferguson
Acclaimed Contributor

Re: Daylight savings

Hi Timothy:

The latest 'tztab' patch for 11.23 is: PHCO_39173

http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=PHCO_39173&sel={hpux:11.23,}&BC=main|search|

You probably have this.

NTP uses UTC and not localtime. Your localtime (or your perception of time) is a positive or negative offset from Universal Time which for UNIX is measured in "Epoch" seconds, or the number of seconds since January 1, 1970.

In HP-UX, the 'TZ' variable holds the timezone value and the standard 'libc' routines perform the necessary conversion. These routines use '/usr/lib/tztab' to find the correct rule for any daylight saving offset and/or the principal offset from UTC. Different users or different processes could elect to use different TZ values if they chose. NTP, and filesystem's metadata track UTC increments only.

Regards!

...JRF...

Re: Daylight savings

I did a swlist -l patch and did not have that one - should I install it
James R. Ferguson
Acclaimed Contributor

Re: Daylight savings

Hi (again):

> I did a swlist -l patch and did not have that one - should I install it

Do you need to? Read the patch notes in the Patch Database to see if you should.

By the way, you should also read:

http://forums.itrc.hp.com/service/forums/helptips.do?#28

Regards!

...JRF...