OVNM 5.3 - Operations Agent for NonStop User Guide

Event Delivery Management 56
Table 6-1 Primary/Backup Mode for Guaranteed Event Delivery
Primary Server Backup Server Action
Enterprise
Manager
Service
OVNM
Connection to
NonStop Server
Enterprise
Manager Service
OVNM
Connection to
NonStop Server
Up
Down
Up
Down
The first Enterprise Manager Server OVNM Agent
to register with the NonStop will send a catchup
request to recollect the lost messages
Up
Down
Down
Up
SAF file will be created on Backup Server till the
Enterprise Manager services on Backup server are
started again
Up
Down
Down
Down
The first Enterprise Manager Server OVNM Agent
to register with the NonStop will send a catchup
request to recollect the lost messages
Down
Up
Up
Up
SAF file will be created on Backup Server till the
Enterprise Manager services on Backup server are
started again
Down
Up
Up
Down
SAF file will be created on Backup Server till the
Enterprise Manager services on Backup server are
started again
Down Up Down Up SAF file will be created on Backup Server till the
Enterprise Manager services on Backup server are
started again
Down
Up
Down
Down
SAF file will be created on Backup Server till the
Enterprise Manager services on Backup server are
started again
Down
Down
Up
Up
Event Messages will Switch to Backup Server
Down
Down
Up
Down
The first Enterprise Manager Server SPI to register
with the NonStop will send a catchup request to
recollect the lost messages
Down Down Down Up SAF file will be created on Backup Server till the
Enterprise Manager services on Backup server are
started again
Down
Down
Down
Down
The first Enterprise Manager Server SPI to register
with the NonStop will send a catchup request to
recollect the lost messages
To set up the Enterprise Management Servers as Primary/Backup:
• The Service type parameter in the elink.cfg file should be set to PRIMARY or BACKUP.
• The -msgqueuing parameter should not be used in the ovnm_start.sh script.
NOTE:
Catch-up request can only be sent from either the Primary or the Backup Server and NOT both.
Event Delivery Management