Daylight Savings Time Change Impact on SMR

Products

• SMR

Issue/Introduction

If I change the time on my operating system by a command such as SET TIMEZONE=W09.00, will SMR adjust its times?

 

Environment

Release: 3.4

Extended Support Basic-for SMR
 

Resolution

The short answer is no. We do not have a way to avoid recycling SMR when changing the operating system time. 

If, for example, your system has ETR MODE=YES and you use operator command SET TIMEZONE=Wnn.nn to set local time, then SMR will close out your logs at unexpected times.

SMR determines the system clock time on initial startup, and calculates the required wait to get to either the BASE time or one of the INT times. At that point the first SMRWTR is triggered and then SMR uses STIMER WAIT for the specified INT value to get to the next SMRWTR time. For this reason it is necessary to stop and restart SMR if the system clock is altered.