I am transporting lots of data with rsync from a Linux client to a NAS, both machines are connected via fast (100 Mbit) Ethernet. The NAS is a Linux-based "slow-CPU" D-Link DNS-323 with telnet and rsync support added. rsync is running as daemon on this box. I would like to speed up the transfer, if possible
The performance bottleneck is the NAS CPU, it is constantly 0% idle. ifstat reports an eth0 throughput of about 7 Mbyte/sec on the client, so the link is not yet saturated, I understand the NAS can handle up to 12 Mbyte/sec on fast ethernet.
I run rsync, both on client and NAS, with defaults, not explicitly enabling or disabling compression or encryption. I do not tunnel via ssh.
This is the rsyncd.conf on the NAS:
port = 873 use chroot = yes pid file = /ffp/var/run/rsyncd.pid [backup] path = /mnt/HD_a2/backup comment = Backup read only = no
The daemon is started with
command line arguments.
The client command line is plain
rsync -r -v <dir> rsync://<nas-ip>:873/backup
Is there a way to reduce load on the NAS so that ultimately the network becomes the bottleneck?