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Limited support BMC provides limited support for this version of the product. As a result, BMC no longer accepts comments in this space. If you encounter problems with the product version or the space, contact BMC Support.BMC recommends upgrading to the latest version of the product. To see documentation for that version, see Recovery Management for Db2 13.1.

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 .

In versions 9.2.00 and later, the TZRULE installation option replaces the FALLTS, PFALLTS, and SPRINGTS installation options. TZRULE enables you to specify the rules for when DST begins and ends. Using TZRULE, you do not need to update the value yearly, as was the case with the previous options.

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.)

Information
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.

Related topic

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


 

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Recovery Management for Db2 12.1