ONS in Oracle

ONS (Oracle notification service)

ONS--A publish and subscribe service for communicating Fast Application Notification (FAN) events. Mainly used for connecting middleware and databases.

Ps-ef | grep ons

Crs_stat-t

Name Type Target State Host

------------------------------------------------------------

Ora. orcl1.ons application ONLINE OFFLINE

Crs_start ora. orcl1.ons

ONS log: $ GRID_HOME/opmn/logs/ons. log .*

ONS config: $ GRID_HOME/opmn/conf/ons. config

Grep port $ GRID_HOME/opmn/conf/ons. config

Localport = 6100 # line added by Agent

Remoteport = 6200 # line added by Agent

Lsof | greenp 6200 | grep LISTEN

Netstat-an | grep 6200 | grep LISTEN

If the process has a daemon, kill the parent process first.

Srvctl status nodeapps

Crs_stat-ls

Onsctl

Usage: onsctl [verbose] <command> [<options>]

The verbose option enables debug tracing and logging (for the server start ).

Permitted <command>/<options> combinations are:

Command options
----------------
Start-Start ons
Shutdown-Shutdown ons
Reload-Trigger ons to reread its configuration file
Debug [<attr >=< val>...]-Display ons server debug information
Set [<attr >=< val>...]-Set ons log parameters
Query [<attr >=< val>]-Query ons log parameters
Ping [<max-retry>]-Ping local ons
Help-Print brief usage description (this)
Usage [<command>]-Print detailed usage description