I intend to reboot all machines Monday night at around 11pm Pacific Daylight Time to upgrade from kernel 6.16.9 to 6.17.0.

6.16.9 has some use after free memory bugs that can and in one case did
result in corruption, that are fixed in 6.17.0 and there are some reworkings
of the ext4 file system that improve performance especially in highly
parallelized loads.

This expected to create an outage of various services between
11pm-11:30pm. There is always the potential for something to go wrong.

There is an off-net name server that will maintain our network identity
even when our primary name servers are down so that mail will be queued and
resent rather than list if it attempts delivery while servers are down.