NetBase for MPE Reference Guide

Chapter 5
5-10
Option Description
LOCK
For non-IMAGE files, open shadow file with lock access
SYNCERR=FAIL
Fail open on shadow file if out of sync
SYNCERR=REMOTE
Access master copy if out of sync (requires NFA)
SHADOW
This option is only valid if the shadow copy of a file exists on the
same computer as the master copy. Specifying this option causes
NetBase to treat this file as the shadow copy.
DUALACC
When this option is specified, both the shadow copy of the database
and the master copy will be opened and accessed. When a call to
DBLOCK occurs, the process is sent to the master system until a
DBUNLOCK is called. This option can be used for an application that
does heavy reading against a shadowed database, a small amount of
updating, and is surrounded by DBLOCK and DBUNLOCK. This option
requires an NFA license. Pending locks must be disabled on the
shadow system.