Why is TERADON necessary?
Without TERADON, the user is typically forced to schedule standalone time to perform the REPRO MERGECAT. 

With TERADON, online systems can remain active and their files can remain OPEN. Requests for each OPEN file that has had its catalog records moved will automatically be redirected to the new TARGET catalog by TERADON. 

How does TERADON perform its function?
TERADON will create an address space (ORXMAIN) and dynamically enable its catalog management mirroring routines. The ORXMAIN address space monitors files requiring mirroring. Since the associated file can be OPEN, this process ensures catalog management requests are correctly handled and directed to the “target” ICF catalog. 

TERADON will require 8K of ECSA and 8 bytes of CSA. All other storage areas are contained within the TERADON address space: ORXMAIN and its associated common data space, ORXDATA. 

What are the TERADON commands?

Used to report on information from TERADON’s address space and mirroring routines. This will include a list of all files which remain OPEN since the REPRO MERGECAT WHILEOPEN was run. Once a file is CLOSED, TERADON automatically removes the file from its control. 

Used to select and move entries from one BCS to another. If data sets are OPEN, TERADON will automatically start the necessary procedures and establish its system interfaces. 

  • Contains a powerful SIMULATE feature that can be used to:
  • Produce a list of selected files
  • Produce a list of files that are currently OPEN
  • Read the TARGET catalog to look for potential duplicate entries