Intra-Partition TS

An intra-partition TS queue lives inside the CICS region, in main storage. It is the fastest kind of temporary storage, and it works like a scratch pad that only this region can see.

What intra-partition means for TS

• "Intra-partition" means inside the CICS region. The data never leaves CICS memory; no outside program or batch job can see it.
• For TS, you get this with the MAIN option on WRITEQ TS. The queue is kept in main storage.
• Because the data stays in memory, reads and writes are very fast - no disk I/O at all.
• The trade-off: it uses region memory, and the data is gone when CICS ends.

When to use it

• Short-lived scratch data, like a customer record held while the user edits it on a screen.
• Terminal paging: format several screen images, store them in a MAIN queue, and let the operator page forward and backward.
• Passing data between two programs in the same transaction flow, where speed matters more than survival.
• Small queues only. Large queues in main storage can starve the region of memory.

How to code it

• Code WRITEQ TS ... MAIN to create the queue in main storage. READQ TS and DELETEQ TS work the same as always.
• If you omit both MAIN and AUXILIARY, the queue goes where your installation default says, so code MAIN explicitly when you mean memory.
• Build the queue name with EIBTRMID so each terminal gets its own private scratch area.

Example:-