Connection between ggate server and client slows down significantly while
coying a file, about more than 20MB file size can cause the problem.
During slowdown, both server and client wants for each other and its
transmission rate is about 1 packet per second. As a result, the system
really hangs up on any responses as FS does not response in timely manner.
All the commands then takes a couple of minutes easily to response to
Copying 20MB file taking more than 20 minuets is critically wrong.
Fix: The problem is ggated and ggatec create 2 TCP uni-directional connections.
That is screwing up the TCP layer. Using 1 TCP connection for bi-
directional messaging fixes the problem.
Patch attached with submission follows:
How-To-Repeat: server# echo "192.168.0.0/8 RW /dev/ad1" > /etc/gg.exports
client# ggatec create -orw server /dev/ad1
client# mount /dev/ad1 /mnt/backup
client# rsync -a --delete /home /mnt/backup
This only happens when server CPU is 10 to 20 times slower than client
and client writes to the device; as far as NIC, they are the same
100BASE-TX on these hosts. It does not happen with all files, neither.
Over to maintainer(s).
Over to maintainer.
For bugs matching the following criteria:
Status: In Progress Changed: (is less than) 2014-06-01
Reset to default assignee and clear in-progress tags.
Mail being skipped
https://reviews.freebsd.org/D26542 was created with backward compatibility options.