Peter Ross wrote:
"Unusably" as in "it took me hours to delete a single 20MB daily snapshot, while the system was disconnected from the network entirely and all its other I/Oy processes were turned off."
Just now on the machine:
zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT zpool 912G 774G 138G 84% 1.00x ONLINE -
At the moment I don't see a performance problem. There are ca. 50 people connected to the mail server, it runs a MediaWiki, a PHP developer box, MySQL for it etc.
It looks as I have to keep an eye on it. I mirror a samba server here, maybe I should do it on another box..
Well, I imagine it gets exponentially worse as you approach 100%. IIRC I was around the 94% mark when users first started complaining that their backups were failing out and I actually looked at the box. I went on a killing spree and it's now under 50%, so I can't easily reproduce the issue, and ICBF pulling any notes that were made at the time out of our stinky in-house ticket system.