[secabeen]

Thanks for the really detailed ZFS allocation write up. I've recently been building ZFS storage systems on Ubuntu 16.04 (one in excess of 800TB), and I've poured over the various ashift/recordsize options and spreadsheets, but your description was quite useful in cementing my understanding of why the large recordsize is useful.

[melp]

I'm glad you think so. I also found it was extremely difficult to find a thorough explanation of the types of overhead I described, so I wanted to get it all together in one place. Working through it while writing it also helped me understand it much better... it's a pretty abstract concept, especially when you factor in compression, etc.