[Box Backup] Re: performance on OpenBSD

Ben Summers boxbackup@fluffy.co.uk
Sun, 18 Nov 2007 19:11:24 +0000

Felix Kronlage <fkr@grummel.net> wrote:
> I've looked at and tried out boxbackup last week on OpenBSD and saw  
> some
> rather strange results concerning the speed of file transfers. Just to
> make sure, I don't overlook anything in the config (even though, the
> config is dead simple), I thought I'd ask here.
> Seeing the constant pattern that it works fine until ~ 240 - 280 MB  
> and
> then dropping, adds a certain 'this sounds like a bug in my  
> configuration
> and or boxbackup' factor to this. So is this speed to be expected? Has
> anyone else on OpenBSD some numbers for me?

Box Backup is not designed for speed, more for a steady trickle of  
backups. The protocol is certainly not optimised for speed. For  
example, lots of small files will be quite slow as it doesn't  
pipeline the transfers. But when you're transferring big files, it  
can go pretty quickly as it's just encrypting and sending.

Does this explain what you see?