this post was submitted on 02 Aug 2023
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I'll give you one reason it's used commercially: Veeam can only use xfs or refs as a deduplication enabled store using fastclone. For example I have a 60 disk nas hosting hundreds of customer backups and a petabyte. Without deduplication imagine how many extra petabytes of storage would be consumed. Each backup is basically the same image as well as the backup processing time.
Maybe they'll get that same feature on zfs one day.
Unless you want me to use refs? But I have tried that, and I've lost a whole volume to iscsi volume mounted to windows and formatted refs due to corruption when a network power loss happened gradually and whatever reason, that network interruption caused the whole volume to be unmountable over iscsi ever again. I'm not keen to retry that.
Xfs is pretty good with 60 disks, I wouldn't trust ext4 with that many but there's nothing factual about ext4 but a feeling.
About to get a second 60 disk nas for another datacentre for the same setup as above to migrate away from Wasabi as offsite. Will build xfs again. Looking forward to it.
ZFS has deduplication, you just don't want to use it. As deduplication grows, it requires more and more RAM on the ZFS server. :(
Dedupe hash table can be moved to ssd but obviously slower
Yeah but veeam doesn't support fast block cloning which means you don't need to ever recopy blocks that don't change. From a performance point of view, fast block cloning gives incredible speed up so that in turn means more backups happen in a short time. That's pretty important even at our small business scale. I guess larger veeam service providers solve things differently.
Hmm, now I wonder how well NTFS deduplication stacks up against XFS and ZFS.
Well enough, I guess, that I'd never heard if NTFS having that feature 'till now. ;)