System Date

[Ahmad Munawwar]

Hi,

I need some advice to determine the best method to change(synchronise) the date&time between 2 N-class HP9000 server. Command example "date", "xntpd", "sam" and set_parms. Would appreciate if someone can share the knowledge.

br,
Munawwar

[Michael Tully · Accepted solution]

Hi,

The preferred method would be to use NTP and to utilise it where both of your systems are getting the time from the same source.

The below document explains how.
http://www.docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90741/B2355-90741_top.html&con=/hpux/onlinedocs/B2355-90741/00/00/67-con.html&toc=/hpux/onlinedocs/B2355-90741/00/00/67-toc.html&searchterms=setting%7cup%7cNTP&queryid=20021111-191541

There is no need to use 'sam', date or anything else. The 'xntpd' (daemon for NTP) will take care of all of it once it is set up.

Regards
Michael

[Michael Tully]

If you utilise the search engine there a quite a number of postings about this particular subject.

Use this search string from the "search" link on the left <------

setting up NTP

[Bill Thorsteinson]

ntp (xntpd) is the preferred method to synchronizer time between servers.
It runs on a continuous basis while the other options run once.
If either clock drifts, ntp will keep the time adjusted.
Differences of over 1/8 second are rare when running ntp.

Try to add an external synchronization source.
There are a number publicly available stratum 2 servers.
These are 2 servers from a reliable time source (often an atomic clock).

Ideally your whole network should be syncronized using ntp.
I find that DNS servers are often also ntp servers.

Use the 'ntpdate -d' or 'ntptrace' command to test potential time sources.
Set your watch to a local time signal or WWV short-wave broadcast.
A good time source will be accurate to within a second of the official time.

[Ravi_8]

Hi,
using ntpdate ,we can synchronize the date and time b/n 2 systems

[Ahmad Munawwar]

Hi,

I successfully set up the xntpd deamon and now my workstation follow the server time. Now if I want to change the date&time on the Server what is the best command to do? date, sam or set_parms. what is the different between these command.

br,
munawwar

[T G Manikandan]

date and time can be modified using all the three.

Sometimes if the sync. time between the server and the client is more the xntpd will die.

But the synchronization of the time can be done with date where you can slew the time gently.

# date [-a [-]sss[.fff]]


Thanks

[T G Manikandan]

Also this doc should be useful

http://www1.itrc.hp.com/service/cki/search.do?category=c0&mode=id&searchString=+A5864817&searchCrit=allwords&docType=Security&docType=Patch&docType=EngineerNotes&docType=BugReports&docType=Hardware&docType=ReferenceMaterials&docType=ThirdParty&search.x=35&search.y=7


Thanks