On 11 April 2011 12:08, Federico Alves <[log in to unmask]> wrote:
> The limitation is not my hardware. The servers are both Dell R900 with SAS
> disk arrays. Also, from a Windows virtual machine, inside the same server,
> I get around 400 MB speed using FTP transfer, windows to windows. There
> must be a different way to do this from Linux.The files are sparse files,
> and I need to keep them that way, that's why I use rsync.

Have you tried rsync server on the remote side? I've always found
transfers over SSH to be rather slower than I'd like although 22Mb is
slower that I'd expect. It comes down to a process of ellimination so
try and get SSH out of the equation and see if that helps. If not,
check disk performance with iostat (part of the sysstat package)  and
make sure there isn't a problem with queues or disk utilisation there.
Check the network for problems - try a different protocol and some
dummy files, make sure there isn't packet loss via netstat.