Alain Raap

We've solved the problem in Bluecoat and progressbar works fine now. But with a large course backup (3.8GB) the backup finishes with a white screen and the backup didn't finish (no new backup in the backup screen). In the temp folder the data of the backup remains. Smaller courses finish without problems.
What could go wrong at this point (the progressbar is at 97,3% at that moment)?

This problem is a firewall (Bluecoat) problem in our environment, who knows if the progressbar is a Java applet? Applets are not trusted content in our network

Thanks Matteo, I'll take a loot at the link. I believe I used it a while ago to tune our NFS settings.
What's your opinion about the 'async' versus 'sync' setting? I tested this and 'async' was a lot faster
with uploading a file to the NFS server (moodledata share).

(I tested with a file of 10GB with dd if=/dev/zero of=/path/to/moodle/nfs/server/tesfile.bin bs=1M count=10000 conv=fsync)

Yes, we use NFS share. We are also going to look for alternatives if it doesn't work out for our Moodle performance. 
Any advice on this matter is welcome! Thanks for the link Visvanath, very useful.

Hi Howard,

What do you suspect a bit unusual? We don't have a very unusual configuration I think..