Comment Re:ZFS (Score 1) 125
IIRC ZFS 2.4 will do parallel zpool imports, so that should help a bit, especially with a big server.
I think half my boot time on a big backup server is LSI device enumeration - which is totally not parallel - so there's only so much one can do.
Could the mptsas devs parallelize this task? It would certainly make lots of people happy.
It's also possible I could fiddle with systemd dependencies to get me a login shell before all the pools are imported because those pools aren't needed at all for the root filesystem. They'll be used minutes to hours later when a backup is initiated.
On my media machine some services like jellyfin need certain filesystems up before it starts but I don't need jellyfin to be started before sshd comes up. Etc.
We're still a ways from having a good tool to automate these dependency trees and most sysadmins are "meh, I can wait two minutes". It's certainly not the ideal for remarkably fast computers.
Also being starved for PCI lanes on pretty much every system is a pain. I'd take lanes over more cores or more GHz any day of the week. Let the data flow!