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Decrease name resolution performance when losing a DNS
On our Power System, we have 3 DNS in the option 12 of cfgtcp. The problem is when I lose a DNS (maintenance, crash, ...) the resolution performance decrease. We have an application (Wish) that do a name resolution of the computer from where the session is launched. When a DNS is down, the time for the connection increase because of the performance of name resolution. We have 2 other DNS up. The solution that the support request give me is to delete the DNS in the Power Systeme OS. I don't understand what's the purpose of putting 3 DNS if performance decrease greatly when I only lose one. I think that when a DNS is unreachable, a timestamp is necessary before try again with it.
When we lose a DNS or do a maintenance on the server.
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