Yost, Donald
2007-01-05 18:17:45 UTC
Hello all,
I run a 4-node cluster of alphaservers running OpenVMS v7.3-2, Multinet
4.4a.
Three times last year the date/time setting in my cluster spontaneously
jumped ahead 1 full day, 24 hours exactly. The first time was on April
14th. The second time was on November 16th, and the last time was on
December 28th. After the second occurrence I adjusted my ntp.conf file
to remove all peer servers and now have all nodes synching to the same 2
internet sites and one internal router. (Our network engineers defend
themselves admirably that none of this stems from this router.) The only
difference is that this adjustment seems to have allowed the system to
correct itself automatically 12 minutes later after the third occurrence
on 12/28.
Each time this has happened it appears to have been at exactly 11:00 AM
EST.
Operator.log shows nothing about this actual event, but I can see from
other logged events when the time changed.
1. Has anyone seen anything like this?
2. Does anyone know what else I can look at to determine the cause
of this?
The ramifications of this are huge for our organization, and getting
ever bigger as we add more application to our system. Any help at all is
greatly appreciated, and I won't be offended by any suggestions, no
matter how simple. Thanks very much.
Don Yost
Information Systems
Martha Jefferson Hospital
(434)982-7076
Email Confidentiality Notice: The information contained in this transmission is confidential, proprietary or privileged and may be subject to protection under the law, including the Health Insurance Portability and Accountability Act (HIPAA). The message is intended for the sole use of the individual or entity to whom it is addressed. If you are not the intended recipient, you are notified that any use, distribution or copying of the message is strictly prohibited and may subject you to criminal or civil penalties. If you received this transmission in error, please contact the sender immediately by replying to this email and delete the material from any computer.
I run a 4-node cluster of alphaservers running OpenVMS v7.3-2, Multinet
4.4a.
Three times last year the date/time setting in my cluster spontaneously
jumped ahead 1 full day, 24 hours exactly. The first time was on April
14th. The second time was on November 16th, and the last time was on
December 28th. After the second occurrence I adjusted my ntp.conf file
to remove all peer servers and now have all nodes synching to the same 2
internet sites and one internal router. (Our network engineers defend
themselves admirably that none of this stems from this router.) The only
difference is that this adjustment seems to have allowed the system to
correct itself automatically 12 minutes later after the third occurrence
on 12/28.
Each time this has happened it appears to have been at exactly 11:00 AM
EST.
Operator.log shows nothing about this actual event, but I can see from
other logged events when the time changed.
1. Has anyone seen anything like this?
2. Does anyone know what else I can look at to determine the cause
of this?
The ramifications of this are huge for our organization, and getting
ever bigger as we add more application to our system. Any help at all is
greatly appreciated, and I won't be offended by any suggestions, no
matter how simple. Thanks very much.
Don Yost
Information Systems
Martha Jefferson Hospital
(434)982-7076
Email Confidentiality Notice: The information contained in this transmission is confidential, proprietary or privileged and may be subject to protection under the law, including the Health Insurance Portability and Accountability Act (HIPAA). The message is intended for the sole use of the individual or entity to whom it is addressed. If you are not the intended recipient, you are notified that any use, distribution or copying of the message is strictly prohibited and may subject you to criminal or civil penalties. If you received this transmission in error, please contact the sender immediately by replying to this email and delete the material from any computer.