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Adjusting for daylight savings time

You can set the values for both BMC AMI Recover and Log Master in the BMC AMI Recovery Manager online interface by using option 8 Customize Options on the main menu. These daylight savings options are used by the Recovery Management solution for the timestamp recovery feature.

For more information about timestamp recovery, see Inflight-resolution-technology-and-timestamp-recovery.

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How-to-recover-to-a-timestamp-or-log-point-with-inflight-resolution

The TZRULE option enables the Recovery Management solution to automatically adjust for daylight savings time when performing timestamp recoveries. While you are not required to set the daylight savings time option, this information can be important if you run a timestamp recovery after a daylight savings time change but are recovering to a timestamp within a period before the time change. (This situation is called recovering across a daylight savings time boundary.)

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Example

On Sunday, daylight savings time goes into effect and the clock is set forward one hour.

On Monday (after the daylight savings time change), you learn that a database needs to be recovered back to 2:00 on Saturday (before the daylight savings time change).

If you supply the correct daylight savings time value for the TZRULE option, the Recovery Management solution will correctly identify the log point that corresponded to 2:00 on Saturday. If you do not specify that a daylight savings time change took place, the recovery point that the solution identifies will be 1 hour earlier than required (2:00 on Monday after the change is the equivalent of 1:00 on Saturday).

If your location uses daylight savings time, you should provide an appropriate value for the TZRULE option to ensure that timestamp recoveries are performed to the correct point.

For more information, see the BMC AMI Recover for Db2 documentation.

 

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Recovery Management for Db2 13.1