Red Hat Enterprise Linux to Oracle Solaris Porting Guide

You can disable a service with the following command, where service name is the name of the

service that you want to disable:

#svcadm disable service name

Managing Service Dependencies in Oracle Solaris

SMF provides a simple mechanism for defining the relationships among various services so that

dependent services can be automatically restarted when necessary. Information necessary to manage

each service is stored in the service repository. This information allows the restarter to move the

service from one state to another state. Each service is managed by a service restarter, which carries

out the administrative actions.

The service configuration repository provides a per-service snapshot at the time each service is

successfully started so that fallback is possible. This capability helps you debug service configuration

problems easily.

The fundamental unit of administration in the SMF framework is the service instance. Each SMF

service has the potential to have multiple versions of it configured, as well multiple instances of the

same version running on a single system.

An instance is a specific configuration of a service, for example, a Web server is a service and a specific

Web server daemon that is configured to listen on port 8080 is an instance. Each instance of the Web

server service can be configured to have different specifications. The Web service will have

system-wide configuration settings, and each instance can choose to override specific configuration.

Migrating to SMF

Migrating services from RHEL to Oracle Solaris SMF is not a difficult task because SMF preserves

compatibility with legacy services. Legacy refers to /etc/rc*.d, /etc/init.d, and

/etc/inittab scripts, which are popularly used in RHEL environments. Legacy services can

continue to work as they did previously, but you will be able to observe these services with SMF.

However, to exploit all the advantages of SMF, such as self-healing capabilities or service restart, you

need to convert the scripts to SMF manifests.

Service Manifests

Information regarding services, service properties, property groups, and instances is added to the SMF

repository. This information is stored in a service manifest that SMF uses when managing services as well

as when determining the root causes of service failures. The service manifest also describes the

conditions under which failed services may be automatically restarted. A separate service manifest is

required per service/application. Oracle Solaris provides some service manifests by default. Optionally,

you can customize these manifests or write your own for other services.

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MICRO SD CARD

CONNECTOR

24V Power / Inputs / I/O

Output: +/-10V at 5mA

Output impedance: 100 Ohms

AMPLIFIER

(WATCHDOG)

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