Both "scrub of death" and "you have to use ECC ram when you use ZFS" are myths.
One good discussion on the topic can be found on: https://reddit.app.link/QOrzkoipIO On Fri, Jul 20, 2018, 22:37 Predrag Punosevac <[email protected]> wrote: > Hi, > > I was wondering if Matt and the other developers involved can shed some > light onto the future of HAMMER1 and ultimately of DragonFly. > > I started dicking with DragonFlyBSD 7-8 years ago mostly due to my > curiosity about HAMMER. I tried few times in the past to use DF as a > main file server at the place of my employment just quickly to reverse > back to ZFS and FreeBSD but my home file server is still happily running > > > dfly# uname -a > DragonFly dfly.bagdala2.net 5.2-RELEASE DragonFly v5.2.2-RELEASE #17: > > dfly# mount > ROOT on / (hammer, noatime, local) > devfs on /dev (devfs, nosymfollow, local) > /dev/serno/B620550018.s1a on /boot (ufs, local) > /pfs/@@-1:00001 on /var (null, local) > /pfs/@@-1:00002 on /tmp (null, local) > /pfs/@@-1:00003 on /home (null, local) > /pfs/@@-1:00004 on /usr/obj (null, local) > /pfs/@@-1:00005 on /var/crash (null, local) > /pfs/@@-1:00006 on /var/tmp (null, local) > procfs on /proc (procfs, local) > DATA on /data (hammer, read-only, noatime, local) > BACKUP on /backup (hammer, noatime, local) > /dev/serno/5QG00XF0.s1e@DATA on /test-hammer2 (hammer2, local) > /data/pfs/@@-1:00001 on /data/backups (null, local) > /data/pfs/@@-1:00002 on /data/nfs (null, NFS exported, local) > > > I feel the time to physically rebuild my home file server slowly > approaching so I would like to be ready for that day. > > In the light of the fact that HAMMER2 is out and recommended for root > partition does HAMMER have any future? I see Tomohiro Kusumi still > having a commit or two a month which touches HAMMER but it seems that > even his commits are minor bug fixes related to his work/poking with > HAMMER2. Is everyone else done playing with HAMMER1? > > Is HAMMER2 now stable enough to guarantee consistency of my data? My > concern is that it typically takes at least 10 years for a file system > to mature under lot of use and abuse by a much wider community than DF. > BTRFS is vaporware even after major investment since 2007. With the size > of the DF community I feel it might takes 20-30 years for HAMMER2 to be > trully safe. > > One of the main advantages for me personally of HAMMER1 over ZFS besides > fine grained history was that it seems to be ok-ish with non-ECC RAM. > Scrub of death > > > https://forums.freenas.org/index.php?threads/ecc-vs-non-ecc-ram-and-zfs.15449/ > is real thing and I feel very uncomfortable using ZFS on my cheap home > hardware. I know that under non-budgetary constrains I should use ECC > memory with DF as well. How safe HAMMER2 is with non-ECC memory? > > Cheers, > Predrag >
