NET/MASTER Management Services (MS) Command Reference Manual

LBANNER
UDBCTL OPEN
NonStop NET/MASTER MS Commands
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YES
specifies that the UDB or UDB pair is opened using the current GUID when an
NCL process uses the FILE OPEN verb. The UDBCTL OPEN command does
not use the Guardian OPEN procedure call to open the file(s).
Note Because the file or pair of files is not opened by UDBCTL OPEN, you do not know whether the file or pair
of files is available until an NCL process attempts to open it using the FILE OPEN verb. However, the
SHOW UDB command always shows that the UDB or UDB pair is available if SWGUID=YES.
NO
specifies that the UDB or UDB pair is opened using the GUID of NonStop
NET/MASTER MS when an NCL process uses the FILE OPEN verb. The
UDBCTL OPEN command uses the Guardian OPEN procedure call to open
the file(s).
TYPE=PERMANENT
specifies that the UDB or UDB pair is opened for permanent access by all
NonStop NET/MASTER MS processes and any NCL processes. The
UDBCTL OPEN command uses the Guardian OPEN procedure call to
open the file(s).
There is one permanent open access point available to NCL processes in
each process. This permanent open access point is used by the first FILE
OPEN verb in a process that accesses the UDB or UDB pair; subsequent
FILE OPEN verbs in the same process use the permanent open access
point if it is not being used.
Opening a UDB or UDB pair for permanent access means that a FILE
OPEN verb may not need to use the Guardian OPEN procedure call to
open the file(s), thereby improving system performance. (For example,
the first FILE OPEN verb in a process that accesses a UDB or UDB pair
does not need to use the Guardian OPEN procedure call to open the
file(s).) You should consider opening a UDB or UDB pair for permanent
access if access speed to information in the UDB or UDB pair is more
important than the memory resources required to keep the UDB or UDB
pair permanently open.