The modern MacOS is pretty amazing at preserving work in most apps now even if 
you have not saved to disk. I have shut down my computer with unsaved changes 
and they are still there when it reboots. And where I live power failures are 
common and I am not on a UPS (long story there). So even when the computer is 
killed by a power failure, when it comes back up I can see almost all the 
recent unsaved changes. I might lose a word or two if I am typing when the 
power goes off, but that is about it. It is pretty amazing to someone like me 
who remembers when pulling the plug on a computer meant you not only lost 
everything unsaved but you had to wait 15 or 20 minutes for the disk to recover 
after a power failure.

Will

On 2020 Sep 10, at 09-10 17:12:09, Adrien Monteleone 
<[email protected]> wrote:

Interesting, I haven't experienced this (though I have experienced crashes, 
outages are handled by my UPS) but I am on an SSD, so maybe you are on to 
something.

Regards,
Adrien

On 9/10/20 10:18 AM, R. Victor Klassen wrote:
> At least on the Mac, there’s no guarantee that it is physically written to 
> disk immediately.  I’ve experienced a handful of posted and printed invoices 
> disappearing due to a power outage.  Probably less likely to happen on a 
> system with an SSD drive, as there’s not as much reason to wait to flush disk 
> buffers to disk.  This would be an issue with the SQLite implementation, 
> likely not in GnuCash directly.
>> 
>> Correct, this is "commiting" the transaction.  At this stage it will only
>> go into the in-memory cache of your data.  It is not written to disk
>> (unless you're using a SQL backend -- that's one of the two main
>> differences between SQL and XML-File storage).
>> You can do this by using Reply-To-List or Reply-All.

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