HDR Failure Scenario
Posted in 2003
I would like to know if the following scenario will work (or whether
it's feasible):
1) Primary goes down.
2) Secondary is changed to standard and then backed up.
3) Backup is then restored to the Primary.
4) Do Backup of primary again.
5) Do onmode -d primary <sec_name> on Primary.
6) Do ontape -p on Secondary.
7) Do onmode -d secondary <pri_name> on Secondary.
8) Logs are then sent to Secondary and HDR starts.
I would like to test this scenario because I know the Secondary contains
the most up-to-date transactions ( Rather than relying on the Secondary
sending them over the network to the Primary after I restore the latest
backup to the Primary - this is the normal Disaster Recovery Process as
prescribed by the Informix Admin Guide).
As for my scenario above, do I really need to do steps 4 and 6(i.e.
Primary backup and Secondary Restore since I got the latest backup from
the Secondary anyway - i.e. will the Secondary complain if I make it
into a Secondary again without doing a restore?)
Any opinions appreciated. Thanks.
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