Good stuff, seems well thought out. Hope you find the issue.

Gary

On Wednesday, 12 December 2018 17:34:24 UTC+10, Dave Harper wrote:
>
> Gary,
>
> The backup strategy I use is a Python script I wrote that is started by 
> cron every night.  I had read that there could be a problem if the database 
> is copied while it's being updated.  The database is updated once a minute 
> by weeWX so the script monitors the mtime of the weewx.sdb file, waits for 
> the timestamp to change then waits about 15 seconds more before copying it 
> to a subdirectory off my home directory.  I also copy the /etc/weewx 
> directory into the same backup subdirectory and then the script calls 
> Duplicity to do the actual backup.  Duplicity works by starting with a full 
> backup the first time around and then doing incrementals from then on.  A 
> restore starts with the original full backup and then applies all 
> incremental changes to get to the target restore date.  To keep a restore 
> process within reason, I only do a month of incrementals and on the first 
> of each month the script creates a new monthly directory on the NAS.  This 
> strategy has seemed to work well over the past year or so and looking into 
> why it failed this time around will be one of the top priorities for 
> tomorrow.
>
> Dave
>

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