topic Time Sync in Operating System - HP-UX

Time Sync

Sergey Polyakoff — Thu, 19 Oct 2000 10:55:06 GMT

Hi!
How I can do time synchronization in my local network. I want to use Server K220 clock and my system is HP-UX 10.20
Thank's

Re: Time Sync

Andreas Voss — Thu, 19 Oct 2000 10:57:44 GMT

Hi,

this can be done best with xntp.

There are several threads for this feature.
Do a SEARCH (upper left button) with search criteria 'ntp'

Regards

Re: Time Sync

Lasse Knudsen — Thu, 19 Oct 2000 10:58:56 GMT

You should use xntpd - lot of examples if you search this forum.

Re: Time Sync

Andreas Voss — Thu, 19 Oct 2000 11:04:33 GMT

Hi,

i've searched the forums and think this is a good thread for you:
http://my1.itrc.hp.com/cm/QuestionAnswer/1,1150,0x65ed6c96588ad4118fef0090279cd0f9,00.html

Regards

Re: Time Sync

federico_3 — Thu, 19 Oct 2000 11:21:28 GMT

Implement NTP on your ?network?

The mechanism which NTP uses to keep systems clocks in syncronization is the following :

From my point of view it's better for you if you keep two NTP peer servers ( if one of these fails there is the other one for the syncronization) with internal system clock as time source and all the other machines as NTP client . This configuration can be done easily with SAM ( Time -> NTP Network time Sources ) or configuring the files /etc/ntp.conf and /etc/rc.config.d/netdaemons as explained in the man xntpd. After this configuration start the Daemon xntpd ( manually doing /sbin/init.d/xntpd start or with SAM -> Start NTP on action)

You could also do like this:
activate the xntpd daemon on one Server (let's say server1) and in the other ones you have to add a cron entry like this:
0 8,16,0 * * * /usr/sbin/ntpdate -s server1

This way it works fine but from my point of view it's better having two peer servers (As explained in the previous mail) in a such way that if one of the ntp client lose connection to one of the ntp servers it's the other one to give the sync.

Federico

Re: Time Sync

Carlo Henrico_1 — Thu, 19 Oct 2000 12:21:20 GMT

NTP is great, I use it and then I also downloaded from http://winfiles.com/ a program called "abouttime" which I loaded on my windows servers and workstations which query the HP NTP and set the time the same as the server's time.

I tried numerous 3rd party products and this one is the easiest to use. Simply changed the servers to query the HP server. Very easy to use.

Re: Time Sync

Steve Emig — Fri, 20 Oct 2000 20:54:33 GMT

I provided a solution to a customer using a product from datum http://www.datum.com/tymserve/
This contained a very accurate clock and a GPS antenna. Once this is setup there is little if any administration and you don't have to pass a firewall to sync. The entire solution is under 5K. I haven't heard back from the customer so if anyone has had experience with product I'd like to know.

Re: Time Sync

Bill Hassell — Sat, 21 Oct 2000 12:32:18 GMT

SAM will allow you to setup NTP quite easily. Look for the Time section in the main menu. Note that many firewalls/gateways offer NTP source (synced to one/many Internet colocks) which eliminates the need for a local clock source.

Re: Time Sync

Fedon Kadifeli — Sat, 21 Oct 2000 13:28:11 GMT

Use one of your servers which has Internet access as a local time server and configure the other servers to get time from your local time server. For example,

* /etc/ntp.conf file in my "local time server" contains the following:

server tick.usno.navy.mil version 3 prefer
server tock.usno.navy.mil version 3
server india.colorado.edu version 3
broadcastclient no
authenticate no
server ben.cs.wisc.edu version 3
server bigben.cac.washington.edu version 3

* /etc/ntp.conf in the other servers contains:

server XXXXXX version 3 prefer

where "XXXXXX" is the name or IP address of your local time server.