You are recommended to have at least three log data sets, and to use dual logging and log archiving. The following table shows suggested values for log and bootstrap data set definitions that affect the performance of queue manager operation, recovery, and restart. Two sets of values are given; one set is suitable for a test system, the other for a production system or a system that will become a production system.
Definition setting | Test system | Production system |
---|---|---|
Log data set size1 | 10 000 records (40 MB approx.)
Access Method Services rounds to nearest cylinder and allocates 10 080 records. |
180 000 records (700 MB or 1 000 cylinders of 3390) |
Number of active logs1 | 3 | 6 |
BSDS size | 60 records (240 KB approx.) | 120 records (480 KB approx.) A primary extent of this size should be sufficient for the maximum number of archive logs that can be recorded in the BSDS (1 000). |
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