An Introduction to IMS: Your Complete Guide to IBMs Information Management System

Keep the following recommendations in mind when planning for your RECON data sets:

• Use three RECON data sets: two current and one spare.

• Define the three RECON data sets with different space allocations.

• Separate the RECON data sets (for example, put them on different devices and channels).

• Use dynamic allocation.

• Do not mix dynamic allocation and JCL allocation.

• Define the RECON data sets for availability, but keep performance implications in mind.