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тАО04-08-2008 06:59 AM
тАО04-08-2008 06:59 AM
Time synchronization in Alpha OpenVMS Cluster
I setup a cluster system,node name is A(IP 192.168.1.1) and B(IP 192.168.1.2). Now I want to use NTP service to implment time synchronization between them and A is time source.
For Node A, I enable NTP service and configure SYS$SPECIFIC:[TCPIP$NTP]TCPIP$NTP.CONF:
Peer 127.0.0.1
and then start NTP.
For Node B, I also enable NTP service and configure SYS$SPECIFIC:[TCPIP$NTP]TCPIP$NTP.CONF:
Peer 192.168.1.1
and then start NTP.
Otherwise I found problem that the time difference between them is always 15seconds.
what's wrong?
Thanks in advance.
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тАО04-08-2008 07:25 AM
тАО04-08-2008 07:25 AM
Re: Time synchronization in Alpha OpenVMS Cluster
We started a discussion about same stuff some days ago. Could you have a look at http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1219839
Regards
Geni
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тАО04-08-2008 07:37 AM
тАО04-08-2008 07:37 AM
Re: Time synchronization in Alpha OpenVMS Cluster
Thanks your quick response!
I read your reference, unfortunately,I can't find the answer.Could you please help me? it's very urgent for me. Thanks a lot!
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тАО04-08-2008 07:48 AM
тАО04-08-2008 07:48 AM
Re: Time synchronization in Alpha OpenVMS Cluster
Sorry,I don't forget to say that there are no external time source and also can't connect tto internet. there is just production LAN. so I want to set node A as time source, and A synchronize B and other nodes.
How to do? Thanks again
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тАО04-08-2008 08:11 AM
тАО04-08-2008 08:11 AM
Re: Time synchronization in Alpha OpenVMS Cluster
see this note from Hoff
http://www.openvms.compaq.com/wizard/wiz_0104.html
about setting a VMS node as an NTP server.
Duncan
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тАО04-08-2008 08:14 AM
тАО04-08-2008 08:14 AM
Re: Time synchronization in Alpha OpenVMS Cluster
you could also skip using NTP totally, since you simply want node A to be the definitive time source.
Why not just issue
$ SET TIME/CLUSTER
from node A on a regular basis (batch job or scheduler)?
See the HELP SET TIME /CLUSTER entry
Duncan
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тАО04-08-2008 08:38 AM
тАО04-08-2008 08:38 AM
Re: Time synchronization in Alpha OpenVMS Cluster
Using NTP gives a consistent time across all your nodes.
Purely Personal Opinion
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тАО04-09-2008 04:11 AM
тАО04-09-2008 04:11 AM
Re: Time synchronization in Alpha OpenVMS Cluster
server 127.127.1.0 prefer
fudge 127.127.1.0 stratum 0
in our system,node A has host names:
192.168.1.1 A
127.0.0.1 localhost
It means that I should change "127.127.1.0" to "127.0.0.1" or "192.168.1.1" or not?
Thanks!
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тАО04-09-2008 04:47 AM
тАО04-09-2008 04:47 AM
Re: Time synchronization in Alpha OpenVMS Cluster
Yes 127.0.0.1 should be used.
Cheers,
Art
ps. Technically you could build a 127.127.1.x network if, as you say, it's a private LAN and the systems don't need to go anywhere.
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тАО04-09-2008 07:07 PM
тАО04-09-2008 07:07 PM
Re: Time synchronization in Alpha OpenVMS Cluster
Thanks!
I found that a description "In these statements, the hardware address of the local clock (LOCAL) is 127.127.1.0. These statements force NTP to use its own system clock as a reference clock." in a documents "HP TCPIP Services for OpenVMS Management.pdf".
127.0.0.1 is the localhost IP address,so
peer 127.0.0.1
is also right?