ZFS tuning

So a ran across an article that brings up a good point about tuning the ZFS fs (not the pool)

Two options that should probably be turned off by default are:

zfs set atime=off tank
zfs set sync=disabled tank


The sync=disable should only be turned off if you have a log device (ssd or fast spinning disk) otherwise you can end up with corrupt data pools.

Zfs defaults.

So there is a lot of food features in zfs and I find myself deploying it more every day..

One of the bad defaults in my opinion is that it won't automatically replace bad disks with Spares. This can be changed through "zpool set autoreplace on"  but it just seems very silly to me.