The general idea is to have a sufficiently large number of keys in reserve
- since the key generation process tends to be computationally intensive, I
do not want to have to generate keys as I need them, for that would have an
impact on the performance of the server. Anyway, I think that your answer
addresses my question all right; thanks.

On Thu, Aug 19, 2021 at 1:15 AM libor.peltan <libor.pel...@nic.cz> wrote:

> Hi Luveh,
>
> what do you need to achieve in first place?
>
> What is your configured key lifetime? "Two years worth of keys" might be
> just "three" for some operators ;)
>
> Do you use `keymgr pregenerate` command to pre-generate the keys? Please
> note, that this feature is intended mostly for Offline KSK operation. And
> it pre-generates just ZSKs.
>
> In any case, if you look at the output of `keymgr list`, you will see the
> "timers" of each key. This should answer the question, in which order they
> will be used: the lifetime phases of all the keys are already pre-planned.
>
> Regarding Knot slowness: it is possible. Knot is programmed possibly
> ineffectively when handling large amount of keys. The reason is, that
> normally there are just few, or at most several keys in the zone.
>
> Libor
> Dne 18. 08. 21 v 22:59 Luveh Keraph napsal(a):
>
> I have been looking into the key pre-generation capability of keymgr, and
> the following question has come up:
>
> Imagine I pre-generate, say, one month's worth of keys for a given zone.
> This zone is defined so that it will be signed automatically on bringing up
> the Knot server.  Next I start the Knot server.  What criteria are used in
> order to select the keys, among the pre-generated ones, to be used to sign
> this zone?
>
> The reason I am asking is because I pre-generated two years worth of keys
> for a particular zone, and when I started the Knot server it took a
> significant amount of time selecting the appropriate keys from among the
> pre-generated ones.
>
>
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