NetBase for MPE Reference Guide

NetBase Shadowing
5-53
The datasets that are defined for a database can be listed as follows:
D> LISTF BANNER.DATA.NETBASE,DSET
O D F S P
P S L Y R L
-----LOCAL REFERENCE------ -----REMOTE EQUIVALENT----- E E A N O O
File Group Account File Group Account Node N T G C T G
BANNER DATA NETBASE -> --Same-- NODE-A - I - - - Y
(Shadow) SHADOW
Datasets: DEVICES HEADERS
Note that if the FILE definition for the IMAGE file is reentered without either the INCLUDE or the
EXCLUDE option specified, the entire database will be shadowed. This has the effect of nullifying
dataset shadowing for the database. Also, the FILE command may be reentered and the
INCLUDE/EXCLUDE option changed. That is, if the database is defined with the INCLUDE option, it
can be changed to EXCLUDE those datasets instead.
On the shadow system, the directory entries would look as follows. The shadow system does not
need to know that the master system is only doing dataset shadowing.
D> FILE BANNER.DATA.NETBASE,1,3
D> SHADOW BANNER.DATA.NETBASE;PASS=CHANGE
Dataset Shadowing Notes
When shadowing only specific datasets, only the database root file and the datasets being shadowed
need be restored to the shadow system. If any detail datasets are to be shadowed, the integrity of
their associated master sets in the shadow copy must be protected:
• The manual master sets associated with shadowed detail sets must also be shadowed.
• The automatic master sets associated with shadowed detail sets must exist in the shadow copy,
but do not have to be shadowed.
Datasets not being shadowed do not have to be restored to the shadow machine.