Re: [rdiff-backup-users] Performance

[Scott Lamb]

On Feb 13, 2007, at 7:14 AM, Charles Duffy wrote:

> All that said, it would be interesting to do some benchmarking to  
> see where time is actually being spent -- waiting for network  
> latency, waiting for the filesystem or doing things in userspace.  
> oprofile should easily distinguish between the latter two cases;  
> more primitive tools (comparing wall-clock/user/system execution,  
> for instance) should provide more general data on the former.

I would also like to see those numbers. The former seems likely, and  
possibly easily fixable - if there's a small fixed buffer size  
somewhere in rdiff-backup, it could mean a serious hit on high  
bandwidth*delay connections.

And if it is doing things in userspace, "python -m profile -s cum  
rdiff-backup ..." would be interesting to see.