Hi Scott, In most situations, you should leave these numbers at their default. The lease file cleanup merely cleans the log file of allocated leases on the disk. This is only used when Kea is restarted so that it can read the leases into memory. If you observe this file, you'll note that Kea writes a line to it every time a lease is changed (allocated, renewed, released). As you can imagine this file can get quite large leading to long startup times if not periodically cleaned. The default is to clean it every 3600 seconds (1 hour) by launching the external lfc program. This should be sufficient as Kea doesn't need to actually do anything but launch the program.
As for reclaim-timer-wait-time (https://kea.readthedocs.io/en/kea-2.4.0/arm/lease-expiration.html#configuring-lease-reclamation) this controls how long Kea waits before looking for expired leases again. Unless you have a slow system, you probably don't need to worry about adjusting this with only ~5000 active leases. If you are concerned, I recommend using `perfdhcp` (https://kea.readthedocs.io/en/kea-2.4.0/man/perfdhcp.8.html) to test your configuration / hardware before deployment. Thank you, Darren Ankney On Tue, Nov 14, 2023 at 12:37 PM Scott Rakow <srs...@gmail.com> wrote: > > I have started the implementation of what could become a large number of > users/pools in a Kea-DHCP4 (20 pools/5000+ IP's) and have some questions > about how to estimate/calculate some of these values. > > How do I determine how long it takes to clean the memfile database? > > What is the best way to calculate the lfc-interval and > reclaim-timer-wait-time? Is it based on the predicted number of IP's that > could/can be used? > > Are there advantages/disadvantages to having a short or long interval/timer? > > Are the valid-lifetime, T1, and T2 values part of how to calculate these > values? > > Thanks > Scott Rakow > -- > ISC funds the development of this software with paid support subscriptions. > Contact us at https://www.isc.org/contact/ for more information. > > To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. > > Kea-users mailing list > Kea-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/kea-users -- ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users. Kea-users mailing list Kea-users@lists.isc.org https://lists.isc.org/mailman/listinfo/kea-users
