Re: [rdiff-backup-users] How to speed up rdiff-backup

[Wiebe Cazemier]

Carsten Lorenz wrote:
> I started the first backup to an empty directory on a second server.
> I'm wandering about the low speed of ca. 1.6MB/s
>
> Both servers are DL380 with dual PIII 833MHz running debian, python2.3,
> librsync 0.9.7-1 and rdiff-backup 1.0.0-0.cvs20050819 (thanks to Dean
> Gaudet for the debian package).
> They are directly connected by gigabit.
>
> I started rdiff-backup this way:
> rdiff-backup -v5 --terminal-verbosity=4 --ssh-no-compression /mnt/files/ 
> 192.168.0.1::/mnt/raid/backup/fileserver2/
>
> Everything looks fine:
> CPU-usage on the source-server is ca.15% for ssh and ca. 6% for rdiff-backup
> CPU-usage on the destination is ca. 18% for sshd and ca. 12% for rdiff-backup
> No swap-space is used.
>
> rdiff-backup needs 132s to transfer a 140MB file (1.1MB/s).
> While rdiff-backup works on the next file scp transfers the same file in 15s 
> (9.3MB/s)!
>
> Since we want to backup one tera-byte of data this would last more than a week.
>
> Has anyone hints how to speedup rdiff-backup?
>
> Carsten

What filesystems are your source and destinatin partition? What are the mount 
options? Could you give me the output of "mount" of both machines?

Also, when copying with SCP, do you copy to the same target partition as you 
would with rdiff-backup?