

Managing an Environment for Subsetting › Minimize Host Encyclopedia Contention › Minimize Contention with Checkouts
Minimize Contention with Checkouts
Users have found the following techniques helpful in minimizing the contention with checkouts:
- Do the checkouts only at night and in batch in the later stages of development, when subset usage is highest.
- You want all developers to put a copy of the JCL in a JCL library to facilitate batch processing.
- Keep the checkout JCL in a common PDS. Submit the JCL at night after migrations are complete.
- Do emergency daytime checkouts only in batch.
- Use electronic mail to communicate emergency checkouts to team members. Try to schedule the activities of team members to spread out the processing load.
- Stagger the checkouts across the team so that not everyone does a checkout every night or single-thread checkouts at night.
- Check out subsets for two separate tasks. Checking out two subsets lets you keep working if checking in the first subset was unable to complete.
Note: If you use batch checkout, do a manual transfer of the file to the workstation.
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