Changing the Time on any computer running DS-Software (DS-System, DS-Billing, BLM, DS-Client, etc.)


Creation Date: June 11, 2008
Revision Date: October 12, 2011
Product: All Products

Summary

This article describes the importance of setting and maintaining the correct time on all computers in your DS-System's environment.

Details

If the time on a computer that is running a DS-System (or DS-Billing, BLM, DS-Client, etc.) service / daemon must be changed:

1. Stop the service / daemon on the computer.

2. Stop the database instance (if any).

3. Change the time / date.

4. Restart the database instance and the service / daemon.

Consequences of changing the computer time on a source computer

Consequences of changing the computer time on a DS-Client

However, the problems for the DS-Client can run much deeper because the current time on the DS-Client computer is automatically used during some processes:

If you must change the time on a DS-Client, it may be better to stop backing up all the defined sets (suspend them), clone them and continue with new backups using the cloned sets. This is probably not something that customers will want, however it is the only way you can ensure that future operations have the required effect.

NOTE: These problems are most likely to occur if the time on the DS-Client computer is changed backwards. Problems will occur if the next backup session runs at a time that is before the time of the most recent backup session.

Consequences of changing the computer time on a DS-System / DS-Billing Server

WARNING: For a Production DS-System, there should be no instance when you need to change the date / time. It must be correct from the beginning (as of the moment it receives the first DS-Client's data), in order to preserve the integrity of the logs.

Daylight Savings

Daylight savings is transparent as long as the computer is configured to switch automatically ("Automatically adjust clock for daylight savings changes").

When the clock moves forward an hour:

When the clock moves backward an hour:

Note: The starting time of some scheduled processes (e.g. Daily Admin) may show the hour difference until the computer is rebooted.



The information provided in this document is provided "AS IS", without warranty of any kind. ASIGRA Inc. (ASIGRA) disclaims all warranties, either express or implied. In no event shall ASIGRA or its business partners be liable for any damages whatsoever, including direct, indirect, incidental, consequential, loss of business profits or special damages, even if ASIGRA or its business partners have been advised of the possibility of such damages. © Asigra Inc. All Rights Reserved. Confidential.


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