News for hackers. Stuff that matters.

A comment on ZFS 2.3.0 released with ZFS raidz expansion. Parent comment

Re:ZFS 2.3.0 released with ZFS raidz expansion by wkat4242 on Tuesday January 14, 2025 @09:53AM (#42697894)
ZFS also had expansion for a long time but it was offline expansion. I don't know if btrfs has also had online for a long time?

And shrinking no, that is a big missing feature in ZFS IMO. Understandable considering its heritage (large scale datacenters) but nevertheless an issue for home use.

But raidz is rock-solid. Btrfs' raid is not.

[ Parent | on HN ]
Re:ZFS 2.3.0 released with ZFS raidz expansion by unsnap_biceps on Tuesday January 14, 2025 @12:03PM (#42700092)
Raidz wasn't able to be expanded in place before this. You were able to add to a pool that included a raidz vdev, but that raidz vdev was immutable.
[ Parent | on HN ]
Re:ZFS 2.3.0 released with ZFS raidz expansion by wkat4242 on Tuesday January 14, 2025 @12:17PM (#42700328)
Oh ok, I've never done this, but I thought it was already there. Maybe this was the original ZFS from Sun? But maybe I just remember it incorrectly, sorry.

I've used it on multi-drive arrays but I never had the need for expansion.

[ Parent | on HN ]
Re:ZFS 2.3.0 released with ZFS raidz expansion by ryao on Tuesday January 14, 2025 @03:16PM (#42703224)
You could add top level raidz vdevs or replace the members of a raid-z vdev with larger disks to increase storage space back then. You still have those options now.
[ Parent | on HN ]