Heya, when you DNS proxy, by default the records are cached. However if an update happened on the DNS entry (change IP), it will be picked up by NS only when the entry TTL expires. I didn't realise this so for now, I've set to max TTL to 900 sec to mitigate this.
I thought it would had been almost instant, pick up the change. Is there a better way to do this? As if you use DNS for failover you are a bit screwed without having to manually flush the cache! thanks