Is ZFS lightweight enough to run on the watch? Their ultimate goal was to have a file system efficient enough and flexible enough to run across all of their OS's - MacOS, iOS, tvOs, and watchOS
The Apple watch has 8 GB of storage and 512 Mb of ram; I don't think that's an unreasonable ratio. Most people discussing zfs memory use have large arrays or deduplication enabled; I'm not sure why dedup would be very useful on a watch. Maybe CPU for checksums is an issue? Apple could probably add acceleration for the checksum algorithm/use an algorithm that was faster/skip the checksums on read + do a sweep when plugged in and fully charged. An 8gb sad only takes minutes to do a complete read, as opposed to a large rotational drive, so you would likely be able to do a full scan in a reasonable amount of time.
Unclear, but a member of the ZFS development team at Apple told me that Giampaolo complained that ZFS would never work on the phone. So the team demonstrated it working on the phone. I know of no obstacles to making it work on the watch other than engineering.
So they still have a team working on ZFS? Could the anonymous "ilovezfs" involved with OpenZFSonOSX and coming from a California IP address be part of this team?