NetBase for MPE Reference Guide

Chapter 5
5-4
Shadow System
The shadow transactions are received by the NBIMPORT process. This process writes the transactions
into import queue files. These files are contained in the QUEUE.NETBASE group. Next, the posting
process, NBPOST, reads the transactions from the import queue files and applies them to the shadow
copies. If the posting process is not running, the transactions will accumulate in the import queue
files. If the posting process encounters a “non-fatal” error when trying to open the shadow copy, it
will write the transactions for that file into a post queue file. These transactions can be recovered
later once the problem has been resolved. There will be one NBIMPORT and NBPOST process for
each master system that sends transaction to the shadow system. Turn to the “Queue State” section,
under “Checking the State of Shadowed Files”, in this chapter for more information. Also see
Appendix B “Troubleshooting NetBase”.
NetBase Background Job
NetBase Background Job
NBIMPORT
NBIMPORT
NBPOST
NBPOST
Import Queue
Import Queue
Post Queue
Post Queue
Database/Files
Database/Files