Daylight savings

[timothy carroll]

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

[James R. Ferguson]

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...

[timothy carroll]

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

[James R. Ferguson]

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...