Optimizing ZFS for Media, Apps, Databases, and Special VDEVs on TrueNAS SCALE

Over the last few weeks I completely re-tuned my TrueNAS SCALE ZFS layout for maximum performance around ARC, L2ARC, special VDEVs, recordsize, and how each dataset interacts with them. I’ve been chasing this idea of having one large hybrid pool with lots of spinning disks backed by fast low latency storage for specific datasets and data access patterns within the pool. My pool contains large ...