Rsync slow as heck for everyone else???

yoh-dah wrote:
Setting delay_ack to 0 shouldn't cause compatibility issue -- it's essentially saying ack on every packet instead of ack on possibly multiple packets. If anything, in some cases, turning off delay_ack may actually improve performance.

It could, however, increase susceptibility to DDOS attacks. Not that I think my box could handle a huge attack nor is it a target.

Chris Green

Has a Infrant-side fix for this been found for a future firmware?

Chris Green

Apologies for resurecting this post but has this issue been addressed in firmware (or can it)?

I realise rsync is fairly CPU hungry so the ReadyNAS isn't really geared for its use to begin with, especially when using a base NV+ with 256MB but I have a production box (NetApp FAS2020) that is based on FreeBSD and have been seeing fairly poor performance when trying to rsync from it. NFS performance isn't too bad at all, presumably because of the lower overheads.

Grateful for an update if there is one :)

Many thanks,

Mike

Let me try to resurrect this topic again. I am trying to backup my old X6 to a box running Fedora 14 and I am observing the same symptoms. In fact it is so slow that I thought is was stalled, but I left it running for more than a day and the log shows that it is still working. In the meantime I rsynced a directory of jpegs from my Mac OS 10.6 and it was very fast. I believe the firmware is up to date. Would be grateful for any suggestion as channel 3 on my X6 is failing and I need a backup.

Created an account to post my solution for this problem.

It's not rsync beeing slow. It's ssh. After compiling the newest version of openssh my problem went away.

wget http://baksmell.netrunner.nu/pub/OpenBSD/OpenSSH/portable/openssh-6.1p1.tar.gz
tar xvf openssh-6.1p1.tar.gz
cd openssh-6.1p1
apt-get install build-essential zlib1g-dev libssl-dev
./configure
make

If you want to change out the default implementation of ssh:

make install

You can use the new ssh-client for rsync/scp without installing it. For rsync:

rsync -e "/root/openssh-6.1p1/ssh" ...

For scp:

scp -S "/root/openssh-6.1p1/ssh" ...

Got 7.5MB/s on avrage on a 500mb file :D