NetBase for MPE Reference Guide

NetBase Shadowing

5-3

The process of reading the transactions from the NBM file is done by NBEXPORT. This is a process

under the NetBase background job. If the NetBase background job is not running, the export

process cannot read the transactions from the NBM file and send them to the shadow system.

The NBEXPORT process reads the transactions from the shadow transport file and sends them to the

shadow system. If NBEXPORT cannot send the transactions to the shadow system, it will write the

transactions into export queue files. Export queue files are contained in the QUEUE.NETBASE group.

When communication is established with the shadow system, NBEXPORT will send any export queue

files over to the shadow system. This could cause the transport file to fill up. If this happens,

processes on the master system could begin to suspend while they wait to write to the NBM file.

NetBase Background Job

NBEXPORT

NBM.IPC

Export Queue

User App

DBPUT

NetBase

DBPUT

IMAGE

NBPUT

Database