These are chat archives for CZ-NIC/knot-resolver

8th
Oct 2018
Robert Šefr
@robcza
Oct 08 2018 11:03
@ookangzheng however with dnsdist you will lose the source IP information, right? depends if you need it
Vladimír Čunát
@vcunat
Oct 08 2018 15:07
Yes. There are proposals to pass that information inside the packet, but not standardized yet.
Robert Šefr
@robcza
Oct 08 2018 20:40
We have experienced huge IOPS on Knot resolver instances in production. Is it probable, that the reason is the lmdb cache persistence? Can we lower the impact on the hdd somehow, e.g with writeback in exchange for having the cache synchronized in realtime?
Vladimír Čunát
@vcunat
Oct 08 2018 21:10
@robcza: you can place the cache into a tmpfs.
If the cache doesn't fit into RAM, the latency will likely be too high anyway. The file mainly provides persistence across daemon restarts and it simplifies sharing among otherwise independent processes.