The idea of this talk was to introduce the need for HA when you consider a centralized NVMe storage array, like in the past SAN storage array, but here with the constraint of the latency, that changes the solution.
|Zivan Ori, CEO and co-founder, E8 Storage|
- implement data services on the host with a sort of very thin storage agent. It allows scale-out offering with a SDS model with features implemented outside the array, the logic is running on the host. But some questions exist such coordination between agents et still the resiliency of the platform. But among the 2 modes, this one is the most scalable of course.
- run these in the controller itself that make possible only scale-up products pretty similar to "classic" controller-based storage appliance and as mentioned you scale "behind" the controller.
The page 25 of the presentation below shows a good table that compares the 2 modes. Data Centers are evolving and NVMe and NVMf are a reality with different offerings on the market, each promoting its own value and differentiator. If you wish to read some vendors collateral, go to Apeiron Data Systems, DSSD, E8 Storage, Excelero, Kaminario, Mangstor or Mellanox.