Defining VSAM clusters

You must define the VSAM data sets to be used for recording data before you start a Monitor III data gatherer session. When you specify a data set on the DATASET option, you must use the dsname you define on the NAME parameter of the DEFINE CLUSTER statement.

You can use the CLIST ERBVSDEF, shipped in SYS1.SERBCLS, to define the data sets. 

ERBVSDEF vsam_dsn VSAMVOL(volume) [TRACKS(num_tracks)]
where:
vsam_dsn
is the name of the Monitor III VSAM data set to be allocated.
volume
is the volume on which the VSAM data set is to be allocated, this parameter is required for systems on which SMS is not active.
num_tracks
is the primary extent of the VSAM data set (the default is 150 tracks).
To define a VSAM data set named RMF™.MONIII.DS1 on the volume DATA01, enter: 
ERBVSDEF 'RMF.MONIII.DS1' VSAMVOL(DATA01)

Controlling data set recording tells you how to specify which data sets are to be used for a particular Monitor III gatherer session.

Parent topic: Defining VSAM data sets