A few years after their introduction, HyperConverged systems are now a reality, slowly but steadily eroding market shares from the traditional server/array platforms. They promised scalability, ease of deployment, operational and architectural simplification. While they mostly delivered on those promises, HCI systems introduced some new limitations and pain points. Probably the most relevant is a consequence of the uniqueness of HCI systems’ architecture where multiple identical nodes – each one providing compute, storage and data services – are pooled together. This induces an inter-dependency between them, as VM data must be available on different nodes at the same time to guarantee resiliency in case of failure. Consequently, HCI nodes are not stateless: inter-node, east-west communications are required to guarantee that data resiliency policies are applied. Unfortunately, this statefulness also has other consequences: when a node is brought down, either by a fault or because of a planned maintenance task, so is the storage that comes with it and data must be rebuilt or relocated to ensure continued operations.
In this third and last post of this Tech Field Day 14 Preview Series, I will focus on Datrium. Truth to be told, a fourth vendor was added at the last minute to the list of TFD14 presenters, and that is NetApp; interestingly enough their presentation will be DevOps oriented and I will report my impressions in a future post when I am back from Boston.
Back to Datrium then. Like myself, this will be the first appearance of Datrium at Tech Field Day, so there was no “TFD prior art” in the form of old presentation recordings I could leverage to get myself acquainted with their solutions, therefore my research was limited to browsing their company website. I hope I got everything right, but I can tell you what I found there was enough to tickle my curiosity; they seem to have an interesting approach to the solution of the converged data center problem, their own buzzword to define this is “Open Convergence”. What I see there is a mix of ideas already heard of before, but even if the ingredients are familiar, the recipe is different and the serving looks yummy! Enough with the gastronomic analogy, let’s talk tech.