vSAN Host Capacity Design

Designing a vSAN cluster from scratch poses a lot of challenges. One of the challenges I encountered is to ensure that resources (memory, CPU and storage) in the cluster gets utilized evenly, and that you for instance don't run out of memory while having plenty of remaining storage capacity. I…

vSAN VM Write Latency Bug

Having recently had the opportunity to do a bit of performance analysis of a hybrid vSAN cluster, I recently found a bug, causing high VM write latency and reduced read cache hit rate. Configuration The vSAN environment analysed is a 6 host cluster running ESXi 6.0U2 (vSAN 6.2)…