[Borgbackup] Slow backup speed

[Sebastian Pölsterl]

Hi,

I'm using borg via borgmatic to backup of about 10TB of data. Since 
incremental backups take about 13 hours, I was wondering if there's any 
configuration option that can be used to speed things up, or if 13 hours 
is an expected duration.

In total, the volume contains about 25 million files, but changes are 
rare. Backups are created daily and are carried out over a gigabit 
network connection with the client's disk mounted via NFS on the server 
running borg. Backups are created with --files-cache ctime,size and lz4 
compression. Based on monitoring bandwidth usage, I would say that 
network bandwidth is not the bottleneck.

Is there any configuration option I have been missing so far that could 
help to speed up daily backups?

Thanks for your help!

-- 
Sebastian