To what Geoff wrote:
The problem is not how to back up you gnucash data. The problem is how
to back up ALL of your user data. There are two fundamentally different
approaches, incremental backup and total as of some date backup. The
usual way to decide is the volume of data to be backed up. whether
there will be backup off site (a second copy), and the cost of backup
medium.
Incremental takes takes space. For example, a job might run during
shutdown that identifies all user files that have changed since last
back up and copies them to the backup space (NOT on your main hard
drive) keeping N versions. This would normally be to on site medium, so
every so often a batch backup of this backup should be made to be taken
off site. The difficulty is during "restore" to get the correct version
<< after a mishap at one of the world's largest "financials" I got
tasked with coming up with something so "never again" << it involved
incorporating the julian date into the file name so would be uniquely
identified in a way that -cycle letters, etc. are not >>
This is always a loss/risk calculation. Thus if you don't have a lot of
data relative to your backup space you might prefer "batch" backups
where a given backup copies ALL user data. You might make one daily,
then monthly make a copy of the end of month, annually make an end of
year (those you keep forever) << if you reuse the daily ones in the next
month and the monthly ones the next year you only need about 50x the
space --- so if you are backing up 20 gigs of user data an external
terabyte drive would do (you might send a copy of the monthlies offsite) >>
Note that THIS method is easier than an incremental if you are restoring
everything to a new machine.
Michael D Novack
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