ZFS special allocation vdev for metadata in TrueNAS (-BETA)


Anyone here having experimented with using fast SSDs (maybe optanes) for metadata, with raidz2 vdevs, and have made some benchmarks? It looks like it could be a killer feature, provided the requirements for redundancy is met (loose the vdev, and loose the pool - just like “normal” vdevs).

Being so new a feature in TrueNAS finding benchmarks isn’t easy yet - the best I’ve seen have been the impact on DDT use (quite impressive).