TimeMachine support for Big Sur - missing F_FULLFSYNC?

Tom Talpey tom at talpey.com
Thu Mar 4 14:18:25 UTC 2021

Just a quick update to say that after an upgrade to Samba 4.11,
as expected Time Machine is working fine from Big Sur. It's
quite simple to configure, in fact - most everything flows
from minimal added settings in smb.conf:

    vfs objects = fruit streams_xattr

    fruit:time machine = yes

mDNS doesn't appear to be functioning for some reason, so
I've hotwired avahi-daemon to advertise the share.

There are some quirks due to my use of a ZFS backend, and
the usual set of Ubuntu package mix-and-match differences,
which is why I'm only on 4.11 for now. I'm sorting out the
fruit:metadata, fruit:resource and fruit:nfs_aces options
relative to ZFS, but Time Machine appears to be not so
sensitive to these. One thing at a time.

I'll try to add something useful to the wiki later.


On 3/2/2021 8:14 AM, Tom Talpey via samba-technical wrote:
> On 3/2/2021 1:56 AM, Ralph Boehme wrote:
>> Hi Tom!
>> Am 3/2/21 um 4:51 AM schrieb Tom Talpey via samba-technical:
>>> Does the 4.7.6 version of vfs_fruit support F_FULLFSYNC advertisement?
>>> I find some mentions of earlier versions supporting F_FULLSYNC (no extra
>>> "F"!), but zero mention of either fullsync or fullfsync in release notes
>>> for any Samba/vfs_fruit version. Is that just a typo, in which case, why
>>> is Big Sur complaining?
>> You need at least 4.8 for this.
> Hi Ralph! I guess I figured Ubuntu would be off-by-one. :)
> I'll upgrade, had hoped to avoid a full network forklift but
> it's perhaps due.
> I think it would be good to refresh the wiki regarding this.
> I did find
>      https://wiki.samba.org/index.php/Configure_Samba_to_Work_Better_with_Mac_OS_X
> which does in fact state the 4.8 requirement in rather fine
> print, but the page says things like "here are suggestions"
> to "improve operability with Mac OS X", and "as far as I know".
> I'll see if I can help improve it after I muddle through the
> situation.
> Tom.

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