In real time you are working on project. That project need to send few accumulated records you need to send for printing. The print application is external so in this kind of scenario you need TDQ. So TDQ are highly useful to share data to across regions. Whereas TSQs are local you cannot share data across regions.
This is why you need TDQ in CICS.
TDQ short story
- Unlike TSQ, the TDQ are task dependent. And you can read only sequentially
- TDQs you need to define in DCT -Destination control table before you use them
Types of TDQ
There are two types. One is intra-partition and other one is extra-partition.
Intra Partition TDQ
- They reside in auxiliary memory
- They can be read only by sequentially
- They are read destructive
- These can be access by other CICS programs
Extra partition TDQ
- These can be accessed by other CICS programs and Batch programs
- They can reside on any device such as tape/disk…
- They are not read destructive
- You can share records to off-line printer
Filed under: CICS, Mainframe Tagged: CICS tdq in mainframe, CICS tips and Tricks
