I’ve been experimenting with options to try and make the backup run faster. I’m currently on 1h15 for a 125GB backup, but it includes hundreds of thousands of files.
disable-file-scanner=true reduces the cpu usage by half but doesn’t make a speed difference,
use-block-cache=true didn’t make any difference, and
usn-policy=on actually slowed it down to over 2 hours (no log warnings).
Is the option not ready for use yet? I let it run 5+ backups before I switched it off, so it had a chance to remember the previous runs. It seems it should be the most useful option, and it’s obviously doing something, just not what you’d expect it to do.
If there’s any other suggestions too please let me know, I’m still transitioning from CrashPlan so I like the idea of a more “live” backup. The biggest speed increase I found was using a single regex string instead of multiple lines. I got a test 1TB backup down to a 15m scan after it was originally taking 2h30.