Time Dependencies with CA-MIM

Document ID : KB000055339
Last Modified Date : 14/02/2018
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If you are a Unicenter CA-MIM customer, you will be glad to learn that Unicenter CA-MIM does not have any time or date dependencies. By design, Unicenter CA-MIM is insulated from time and date issues. Although Unicenter CA-MIM does use various timers (STIMER/TTIMER) internally, they are used to measure elapsed time, for example, T-30 seconds, T-29 seconds, etc. Unicenter CA-MIM does not do any scheduling, nor does it maintain internal calendars, both of which may depend on date and time stamps. For example, when performing serialization, Unicenter CA-MIM does not use the date and time to keep track of when an ENQ was issued or when a tape device was allocated.

Daylight Savings Time

Starting in 2007, the starting and ending dates for Daylight Savings time (DST) is changing to the second Sunday in March and the first Sunday in November, respectively. Unicenter CA-MIM transparently supports daylight savings time changes, both forward and backward, on different dates of the year all over the world, and has done so for years.

Leap Year/Leap Second

Unicenter CA-MIM is compatible with date and time changes associated with leap years and leap seconds.

Geographically Dispersed LPARs

Unicenter CA-MIM can also handle two LPARs that have different local times or from different time zones. A DISPLAY SYSTEMS command shows each system's local time in the control file. Unicenter CA-MIM will not issue MIM0061 messages locally for an external system that is one hour behind the local system.