Dbgcache()

PURPOSE

enable the distributed cache manager on OpenVMS systems

SYNOPSIS

#include	"dbl.h"
 
	int	dbcache(mode)
 
	<input parameters>
	int	mode;		/* ON | OFF toggle, 0 – OFF, 1 – On */
 
	<output parameters>
	none

RETURN VALUE

This functions returns 0 upon completion.

DESCRIPTION

This functions enables/disables the distributed cache manager on OpenVMS systems. Normally, if a database or index is opened shareable, any database or index caches specified are not active for the shared files. With the distributed cache manager activated, shared database and index caches are handled by the manager which allows separate processes access to the global cache. Note that proper ENQLM quotas for the processes instituting global caching are necessary.

EXAMPLE

The following example enables global caching on a shared database. Note the use of dbfilemode() and dbdcache().

#include "dbl.h"
	int	dbf;				/* Database file descriptor */
	int	rc;				/* Return Code variable */
 
	rc = dbfilemode(1,0);	/* Shared, Write access */
	rc = dbdcache(100);		/* Database cache of 100 records */
	rc = dbgcache(1);		/* Enable Global Caching */
 
	if (rc = dbopen("dbctest.dbf", &dbf) != 0) {
		fprintf(stderr, "Database Open Failure: %d\n", rc);
		exit(1);
	}

SEE ALSO

dbfilemode(), dbdcache(), dbicache()