Roland0 wrote:
> >
Code:
--------------------
> >
> outtime=$(stat -c"%Y" "$outfile") && intime=$(stat -c"%Y" "$infile")
> if [ -n "$outtime" ] && [ "$intime" -ne "$outtime" ]; then
>
--------------------
> >
> will reduce file accesses.
I had to change the logic slightly, because I want the
transcoding/editing/copying to take place if either the source and
target files have different timestamps, or the target file doesn't
exist. So my test is as follows:
Code:
--------------------
outtime=$(stat -c"%Y" "$outfile") && intime=$(stat -c"%Y" "$infile")
if [ -z "$outtime" ] || [ "$intime" -ne "$outtime" ]; then
--------------------
So I think I'm done now. I will set up my spare Pi Zero W as follows:
- use cron to backup my main library, which is mounted as a network
share from my main Pi 3B+. It'll use rsync to another hard disk
attached to the Zero, and will exclude group, owner and permission
checks, as well as allowing for timestamps to be up to 1 second
different.
- run my script to update my compressed library, which is in a separate
folder on the backup disk, from this backup.
This will ensure that my backup and my compressed copy are always up to
date. I can then occasionally rsync the compressed copy to the MicroSD
card in the 3A+ in my camper van.
I'm a happy camper now :). Thanks for the advice and tips in this
thread - most appreciated.
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