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Managing System Information, Processes, and Performance in Oracle® Solaris 11.4

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Updated: August 2021

Scheduling Repetitive System Tasks With SMF

How SMF Handles Scheduling

Each SMF scheduled service is managed by a restarter. The master restarter svc.startd manages states for the entire set of service instances and their dependencies. The master restarter acts on behalf of its services and on delegated restarters that can provide specific execution environments for certain application classes. For example, inetd is a delegated restarter that provides its service instances with an initial environment. Each service instance delegated to inetd is in the online state. While the daemon of a particular instance might not be running, the instance is available to run. As dependencies are satisfied when instances move to the online state, svc.startd invokes start methods of other instances which may overlap. See the smf_restarter(7) man page to view the configuration settings for all SMF restarters.

Each service or service instance must define a set of methods that start, stop, and, refresh the service. For a complete description of the method conventions for svc.startd and similar restarters, see the smf_method(7) man page. Administrative methods, such as for the capture of legacy configuration information into the repository, are discussed in the svccfg(8) man page.

Scheduling Method and Time Values for SMF

A scheduled service instance in SMF requires a specific time which is delegated by the scheduled_method element. The scheduled_method element specifies both method and scheduling information for scheduled services.

The following are the acceptable numerical values for SMF scheduling:





Day of month




Day of week

0-6 (0 = Sunday)

For more information about constraints and how to specify the scheduled_method element, see Specifying the scheduled_method Element in Developing System Services in Oracle Solaris 11.4.

Sample SMF Manifest

The following example shows how to create an SMF scheduled service instance to run automatically at 1:00 a.m. every Sunday morning.

<?xml version='1.0'?>
<!DOCTYPE service_bundle
  SYSTEM '/usr/share/lib/xml/dtd/service_bundle.dtd.1'>
<service_bundle type='manifest' name='site/sample-periodic-svc'>
    <service type='service' version='1' name='site/sample-periodic-svc'>

        <instance name='default' enabled='false'>

                        <method_credential user='root' group='root' />


For more examples, see Chapter 3, Creating a Service to Run Periodically in Developing System Services in Oracle Solaris 11.4.