Installation and User's Guide

Chapter 7. Tivoli Storage Manager scheduler overviewThe Tivoli Storage Manager central scheduler allows client operations to occurautomatically at specified times.In order to understand scheduling with Tivoli Storage Manager, several terms needto be defined:schedule definitionA definition on the Tivoli Storage Manager server which specifies criticalproperties of the automated activity including the type of action, the timethe action should take place, and how frequently the action takes place.There are numerous other properties which can be set (see the appropriateTivoli Storage Manager Administrator's Reference Guide for a detaileddescription of the define schedule.)schedule associationAn assignment to a specific schedule definition for a client node. Multipleschedule associations allow single schedule definitions to be used by manyclient nodes. Because schedule definitions are included with specific policydomains, it is only possible for nodes defined to a certain policy domain tobe associated with schedules defined in that domain.scheduled eventA specific occurrence of when a schedule is executed for a node. Thefollowing conditions must be met before automatic scheduled events takeplace for a client:v A schedule definition must exist for a specific policy domain.v A schedule association must exist for the required node which belongsto that policy domain.v The client scheduler process must be running on the client system.When creating a schedule definition on the Tivoli Storage Manager server, scheduleactions that you can take include incremental, selective, archive, restore, retrieve,imagebackup, imagerestore, command, and macro. The scheduled action that ismost frequently used is incremental with the objects parameter left undefined. Withthis setting, the Tivoli Storage Manager client performs a domain incrementalbackup of all drives defined by the client domain option. A schedule definitionusing the command action allows an operating system command or shell script tobe executed. When automating tasks for Tivoli Storage Manager for Data Protectionclients, you must use command action schedule definitions which invoke thecommand-line utilities for the "Tivoli Storage Manager for" application.The schedule startup window indicates the acceptable time period for a scheduledevent to start. The startup window is defined by these schedule definitionparameters: startdate, starttime, durunits, and duration. The startdate and starttimeoptions define the beginning of the startup window for the very first scheduledevent. The beginning of the startup windows for subsequent scheduled events varydepending on the period and perunit values of the schedule definition. The durationof the schedule window defines the length of the startup window. The scheduleaction is required to start within the startup window. To illustrate, consider theresults of the following schedule definition:define schedule standard test1 action=incremental starttime=12:00:00 period=1perunits=hour dur=30 duru=minutes© Copyright IBM Corp. 1993, 2010 217