On 15Jul20, Tony Finch allegedly wrote: > I've been wondering about the effects of stub resolvers with caches as > clients of recursive servers. To what extent do they cause a thundering > herd effect where all the cache entries expire with the same deadline?
I'm not sure how a stub cache could make things worse. Queries passed thru to the recursive server can never be more frequent or have different arrival rates than if the stub doesn't cache at all, can they? IOWs, isn't a stub cache just short-circuiting some queries which might otherwise end up at the recursive server? The stub's not moving queries in time is it? Or are you thinking of an aggressive stub which re-populates on its own initiative? That I imagine could create a thundering herd scenario. Mark. _______________________________________________ dns-operations mailing list [email protected] https://lists.dns-oarc.net/mailman/listinfo/dns-operations
