IBM Tivoli Storage Manager for UNIX and Linux Backup-Archive ...

Related reference“Postschedulecmd/Postnschedulecmd” on page 365The postschedulecmd/postnschedulecmd option specifies a command that theclient program processes after it runs a schedule. The client program waits for thecommand to complete before it continues with other processing.“Preschedulecmd/Prenschedulecmd” on page 368The preschedulecmd option specifies a command that the client program processesbefore it runs a schedule. The client program waits for the command to completebefore it starts the schedule. If you do not want it to wait, specifyprenschedulecmd.Using the client acceptor to manage scheduler services versus thetraditional scheduler servicesYou can configure the Tivoli Storage Manager client to manage the schedulerprocess using the Tivoli Storage Manager client acceptor. The client acceptordaemon provides a light-weight timer which automatically starts and stops thescheduler process as needed. Alternatively, the traditional method keeps the TivoliStorage Manager scheduler process running continuously. Generally, using theclient acceptor daemon to manage the scheduler is the preferred method.The following information is a comparison of the client acceptor daemon-managedservices and the traditional scheduler services methods.client acceptor daemon-managed ServicesvvvvDefined using the managedservices schedule option and started withclient acceptor daemon services (dsmcad).The client acceptor daemon starts and stops the scheduler process asneeded for each scheduled action.Requires fewer system resources when idle.Tivoli Storage Manager client options and Tivoli Storage Manager serveroverride options are refreshed each time the client acceptor daemonservices start a scheduled backup.v Cannot be used with SESSIONINITiation=SERVEROnly backups.Tivoli Storage Manager traditional scheduler servicesv Started with command dsmc sched command.v Remains active, even after scheduled backup is complete.v Requires higher use of system resources when idle.v Tivoli Storage Manager client options and Tivoli Storage Manager serveroverride options are only processed once when dsmc sched is started.v You must restart the scheduler process for updated Tivoli StorageManager options to take effect.Recommendation: Restart the traditional scheduler periodically to free systemresources previously used by system calls.Chapter 7. Using the Tivoli Storage Manager central scheduler 213