shuppy (@delan) — [archived]

one weird trick to speed up your zfs metadata by 10x

venus, my home server, now with an intel 730 240GB in addition to the existing intel 730 480GB, so we can put the special vdev on redundant flash

the trick is adding a “special” vdev 🚄⚡

$ time du -sh /ocean/private
2.5T    /ocean/private
11:16.33 total

(send, add special, recv, remove l2arc, reboot)

$ time du -sh /ocean/private
2.5T    /ocean/private
1:17.16 total

https://forum.level1techs.com/t/zfs-metadata-special-device-z/159954