Just got the chance to finally sit down and watch Ben Rockwood’s presentation at LISA 09: ZFS in the Trenches. If you are even thinking about ZFS and how it works, it’s a very informative presentation. There is very little marketing-speak, and he very specifically targets sysadmins as his audience. Great stuff! Of interesting note about his comparison of fsstat vs iostat, our Apache webservers routinely see about 5MB/sec reads being asked of ZFS, but the actual iostat on the disk shows that almost all of that traffic is being served up from ARC.