we are running a huge picture site, where ppl can upload partypics and serve it to others.
I bought a new Fileserver, 12x1TB sata-hdd, with raid 6 on a 3ware controller, and XFS as filesystem. This Server is Backend for 2 Varnish Cache-Servers.
The Fileserver has around 12Million pictures on it, in dif. Formats. (8kbs - 250kbs) and on Peak around 4000 ppl.
I wonder if XFS is the best FS for this environment, because the server still has a lot I/O Wait (like 30-50%).