Topic: vsan-esa-memory-tiering

2026

1. August 12, 20266 min read

   vSAN ESA and memory tiering · 03/03

   Capacity planning: ESA vs OSA, what really changes

   Switching from OSA to ESA changes how you size a vSAN cluster. We compare the two models side by side: usable capacity, headroom, and the new rules.

2. August 10, 20266 min read

   vSAN ESA and memory tiering · 02/03

   NVMe memory tiering: 2x VM density, and what it costs

   At the recommended 1:1 ratio, Broadcom reports 2x VM density with a 5–10% HammerDB performance loss; this guide defines the eligibility conditions.

3. August 3, 20266 min read

   vSAN ESA and memory tiering · 01/03

   RAID-5/6 on vSAN ESA: what replaces the write penalty

   ESA replaces read-modify-write with a durable log and aligned full-stripe writes, while vSAN 9.1 still documents a possible RAID-1 advantage.