Extra ICA High Availability Considerations

ICA is fully dependent on external integrations. If those controls or applications go down, ICA is no longer up to date. With many of the database-to-database integrations, you can place a network load balancer (NLB) between integrations if HA/DR is configured correctly.
Alternatively, you can configure ICA to integrate with both instances of another application. If ICA goes down, you can manually turn off the
old
integration and turn on the
new
integration. Usually ICA  back loads data from another data source after it comes back up. ICA back loads data because it tracks a
watermark
on each integration. As long as the data source is not purged, ICA catches up automatically, though there may be a one-time spike in the length of processing time.