Originally posted by billyswong
View Post
Announcement
Collapse
No announcement yet.
Bcachefs Merges Support For Btrfs-Like Snapshots
Collapse
X
-
Originally posted by flower View Postraidz works well without a ssd or any kind of tiered storage. it doesnt write raidz data twice
EDIT: it's not even possible to do that. you can only cache sync writes. normal writes never use any kind of caching
The point is that the RMW cycle of the parity requires two condition:
1) all the stripe is empty
2) or the RMW cycle is protected by a LOG
ZFS, thanks to the variable stripe size, does 1; however in case of small changes there is a fragmentation problem. Anyway changing in the middle of a stripe requires the rewriting of the full stripe.
So, ZFS is the best incarnation of the RAID5/6/7; however the RMW cycle requires some technical compromises which lead to some performance penalty, which is mitigated by the ZIL/SLOG/L2ARC
Comment
-
Originally posted by darkbasic View Post
btrfs: raid5 is a joke
- Likes 1
Comment
-
Originally posted by mdedetrich View PostAgain, completely different situation and Oracle was just finishing what Sun wanted to do. Remember the case with .net implementing Java?
Comment
-
-
-
Originally posted by Tuxie View Post
I don't have all the exact commands ready, but here is the gist of it. Very quick and dirty hacked together guide, you'll need to RTFM to fill in the gaps
...
BTW, I use disk -> bcache -> luks -> xfs -> mergerfs myself, but this guide is for disk -> luks -> bcache -> xfs -> mergerfs, which is how I would do it if I were to start over. Also make sure that the root filesystem where you put /etc/luks.pwd is encrypted!
Comment
-
Originally posted by maffblaster View PostWith your permission I'd like to take the content you wrote up and convert it for use on the Gentoo wiki. Do I have your sign-off? Thank you for the excellent guide!
Comment
Comment