Re: [weewx-development] WU Updates and DNS

[Joel Bion]

To make my point more precisely, unless weewx is somehow explicitly indicating it wants a fresh, not cached, entry (can an app even do that?!) I don’t see how weewx can be at fault here. Does your weewx-running machine run a local caching DNS resolver? Have you verified its use and configuration using tools like “dig”? Sent from my iPhone On Jan 4, 2024, at 8:06 AM, Joel Bion <jpb...@gmail.com> wrote: Should WeeWX, or any application, be aware of how DNS gets the address, including the use of a cache? I tend to think “no” as that breaks “layering” (leaving the network details out of the application, in this case) Usually you get the operating system’s networking stack, or DNS supporting application, to do dns caching for you. For example, using unbound, or dnsmasq or if you use systemd, there’s a resolver with that, too.  Are you running one? Sent from my iPhone On Jan 4, 2024, at 6:30 AM, G Hammer <gary.ham...@gmail.com> wrote: I recently regraded my LAN and in doing so forgot to have my WeeWX machine use external DNS. It was pointed to my pihole DNS servers. Because of that, I see that the WU update is not very well behaved. It seems to call for a new DNS lookup every time it fires. With rapid fire on, that is 85000+ DNS calls daily! rtupdate.wunderground.com 85026 wx.lan 87934 That number of lookups raised warnings on my pihole machines, they want more resources to handle the high volume of calls. I reconfigured the WeeWX machine to use external DNS, but the issue is just being pushed elsewhere. Nothing on my network makes that many DNS lookup calls, not even close. Every OS I'm aware of has a DNS cache, WeeWX doesn't seem to use it though. However, WU has a TTL of only 60 seconds, but that is still around 24X less. Any thoughts? -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-development+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/6cdab24d-9998-4e39-b29a-d69a430ed45an%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "weewx-development" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-development+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-development/CA514115-415E-46DC-A543-A63D38E52838%40gmail.com.