disconnect while sync, what happens?

[pauloandrept]

Hi, I am looking for a sync/backup solution and FFS seems perfect for the job.
The idea is to sync laptop A, laptop B, server C and server D, then backup
multiple versions in server D.
Server C is always in the same network of the laptops, so the sync will be A
<->C <->B.
Since server C does not have a lot of disk space, it will only keep the last
sync copy.
It will then sync with server D ( C <-> D), that is in another location (so
much slower sync, only once a day) and in server D the sync will save the
changed files to have a kind of svn backup, with all the changes tracked.
From what I read in the forum, this is all supported (but anyway, could you
confirm?), however my question is what happens if, for example, the battery of
laptop A dies in the middle of a sync session with server C. Will the server C
have corrupt/missing files?
Also, if the sync C <-> D happens after this failure, will the server D have
corrupt/missing files?

[Zenju]

> this is all supported (but anyway, could you confirm?)
Confirmed.

> Will the server C have corrupt/missing files?
If transactional file copy is active in global settings (the default) this
will not be a problem. There will be a garbage temp file that gets cleaned up
automatically the next time you sync.

> if the sync C <-> D happens after this failure, will the server D have
corrupt/missing files?
The FFS temp files will not be synchronized and FFS will synchronize the
completed file updates until the battery loss happened.

[pauloandrept]

Thanks for the answer!
Now I know FFS is perfect for the job