Re: [rdiff-backup-users] Does rdiff implement kernel specific optimizations?

[Andrew Ferguson]

On Jan 6, 2009, at 7:16 PM, Greg Freemyer wrote:
> I just came across tee() and splice().  They were introduced in
> 2.6.17, so relatively new, but not that new.
>
> http://linux.die.net/man/2/tee
> http://linux.die.net/man/2/splice
>
> They allow data to be copied from one file descriptor to another
> without the data coming into userspace.


Until the rsync algorithm is implemented in kernelspace, the file data  
will have to be in userspace in order to be useful to rdiff-backup. :-)


> If I was still an active developer, I think about modifying
> rdiff-backup to use them if there available.
>
> I doubt it would really impact the speed of rdiff-backup, but it seems
> like a fun project and I always liked learning new system calls.


Perhaps adding them to Python would be fun project?


Andrew