MONGODB / ARM64 / AUTOMATION

A small cluster.
A proper experiment.

Four RK1 modules on a Turing Pi platform: three MongoDB data nodes and a dedicated control and monitoring node.

COMMUNITY & PUBLICATIONS

MongoDB Champion 2026.

I’m part of the MongoDB Champions 2026 community ↗. My two-part MongoDB on ARM series was also published in MongoDB’s official publication on Medium.

Read Part I on Medium ↗Read Part II on Medium ↗

Build it. Operate it. Measure it.

The project combines Ansible automation, a MongoDB replica set, Prometheus and Grafana monitoring, and repeatable workload experiments on compact ARM hardware.

Two articles separate the platform build from the controlled memory-management experiments. Platform-capacity snapshots and THP A/B tests use different workloads and should be read independently.

REFERENCE NODE ROLES

Node A
DataNode B
DataNode C
Data

↕

Node D · Control & monitoring

Conceptual roles; no private network details.

PART I / BUILD & OPERATIONS

Building a tiny MongoDB cluster →

Hardware, automated deployment, monitoring, and operating lessons.

PART II / MEMORY & MEASUREMENT

THP, TCMalloc & WiredTiger →