SAM_INITIALIZE(3)				    Corosync Cluster Engine Programmer's Manual 				 SAM_INITIALIZE(3)

NAME

       sam_initialize - Initialize health checking

SYNOPSIS

       #include <corosync/sam.h>

       cs_error_t sam_initialize (int time_interval, sam_recovery_policy_t recovery_policy);

DESCRIPTION

       The sam_initialize function is used to initialize health checking of a process.

       Application  can  have only one instance of SAM. This function must be called before any other of SAM functions.  It is recommended to ini-
       tialize before the process begins any process initialization.

       The time_interval parameter is a timeout in milliseconds before taking recovery action after having not received a healthcheck.

       If time_interval parameter is zero, there is no time limit and no healthcheck must be sent by the process.  In  this  operational  mode,  a
       process failure will continue to execute the recovery policy.

       The recovery_policy is defined as type:

	 typedef enum {
	    SAM_RECOVERY_POLICY_QUIT = 1,
	    SAM_RECOVERY_POLICY_RESTART = 2,
	 } sam_recovery_policy_t;

       where

       SAM_RECOVERY_POLICY_QUIT
	      on failure, the process will terminate.

       SAM_RECOVERY_POLICY_RESTART
	      on failure, the process will restart.

       To  perform  event  driven  healthchecking, sam_register(3) and sam_start(3) functions must called.  Event driven healthchecking causes the
       duplicate standby process running the SAM serve rto periodically request healthchecks from the active process.

RETURN VALUE

       This call return CS_OK value if successful, otherwise and error is returned.

ERRORS

       CS_ERR_BAD_HANDLE
	      can happened in case of double initialization.

       CS_ERR_INVALID_PARAM
	      recovery_policy has invalid value.

SEE ALSO

       sam_register(3), sam_start(3), sam_hc_callback_register(3)

corosync Man Page						    12/01/2009							 SAM_INITIALIZE(3)