Data sharing members that participate in a read
The number of data sharing members whose logs participate in a particular read request varies based on what statements are used.
If you use the GROUP DD statement, then the determinant
is the number of members in the group. Otherwise, the number of different xxs
and yys used in the Mxx and
Myy type DD statements.
For example, assume you need to read log records from members S1, S2, S3, S4, S5, and S6.
- S1 and S2 locate their log data sets by their BSDSs.
- S3 and S4 need both archive and active logs.
- S4 has two active log data sets.
- S5 needs only its archive log.
- S6 needs only one of its active logs.
You then need the following DD statements to specify the required log data sets:
- MS1BSDS
- MS2BSDS
- MS3ARCHV
- MS3ACT1
- MS4ARCHV
- MS4ACT1
- MS4ACT2
- MS5ARCHV
- MS6ACT1
The order of the DD statements in the JCL stream is not
important.