Re: [rdiff-backup-users] ssh speed problems

[Andy Wettstein]

Ok

I combined all suggestions and upgraded OpenSSH to 3.9.1
(openssh-portable port on FreeBSD).  I do the ssh to localhost, so
operating systems are the same and changed the cipher.  I also backup 
a local disk, now.  The results are better, but still not fast.  
(zebedee is a FreeBSD 5.2.1 on a xeon 2.4Ghz)


My .ssh/config looks like this:
host primary-backup
        hostname 127.0.0.1
        compression no
        ciphers arcfour
        protocol 2

address@hidden /tmp >time rdiff-backup --ssh-no-compression 
primary-backup::/tmp/ajw /tmp/ajw-backup
Enter passphrase for key '/home/admin/ajw/.ssh/id_dsa':

real    4m14.582s
user    0m8.124s
sys     0m5.351s

rsync:
address@hidden /tmp >time rsync -ar primary-backup:/tmp/ajw/ /tmp/ajw-backup/
Enter passphrase for key '/home/admin/ajw/.ssh/id_dsa':

real    0m35.896s
user    0m5.500s
sys     0m3.445s

tar through ssh:
address@hidden /tmp >time ssh primary-backup "tar -cf - /tmp/ajw" > ajw.tar
Enter passphrase for key '/home/admin/ajw/.ssh/id_dsa':

real    0m21.646s
user    0m4.033s
sys     0m1.444s

These are the results on the NFS server running Tru64 (same .ssh/config):
address@hidden /tmp >time rdiff-backup --ssh-no-compression 
primary-backup::/export/home/admin/ajw /tmp/ajw-backup
Enter passphrase for key '/home/admin/ajw/.ssh/id_dsa':

real    1m19.408s
user    0m20.694s
sys     0m13.173s

address@hidden /tmp >time rsync -ar primary-backup:/export/home/admin/ajw/ 
/tmp/ajw-backup/
Enter passphrase for key '/home/admin/ajw/.ssh/id_dsa':

real    0m39.735s
user    0m10.303s
sys     0m7.015s