Re: [HTCondor-users] Upgrading the cluster piecemeal instead of big bang

[Dennis van Dok <dennisvd@xxxxxxxxx>]

Op 03-03-2026 om 15:20 schreef Cole Bollig via HTCondor-users:
> Hi Dennis,
>
> We try our best to not break communications between versions but guarantee interoperability between the current (v25) and the previous (v24) major versions that are being supported. Note there is the caveat of some functionality newer functionality not being available if said feature requires changes on multiple parts (i.e. AP and EP). We, the CHTC, actually make sure to test interoperability in our local pool by having an older version set up. Otherwise most of our pool is running the most recent unreleased Alpha or Beta version for testing purposes (since we develop HTCondor).

Hi Cole,

thanks for the reply. That boosts our confidence in the plan.
> As for upgrade order, it shouldn't matter, but I believe we upgrade our CM first and do the rest is waves.

Yeah, it's CM first for sure.