C4 Context

%% C4 Level 1 — System Context %% Diagrams as code. Render with any Mermaid renderer. graph TB subgraph external[" "] apps["Applications<br/>(Drive product, S3 clients,<br/>future collaborative editor)"] ops["Operators"] end system["<b>Distributed Storage System</b><br/>globally scalable, atomically consistent<br/>file storage foundation"] subgraph deps["External dependencies"] coord["Coordination service<br/>(etcd, prod)"] cpdb["Global control-plane DB<br/>(TiDB / TiKV)"] otel["Observability backend<br/>(operator's choice via OTLP)"] hw["Provider compute & storage<br/>(organized into zones)"] end apps -->|"S3 / FUSE / WebDAV / SDK"| system ops -->|"management API (gRPC/REST)"| system system -->|"OTLP telemetry"| otel system -->|"coordination"| coord system -->|"global namespace & placement"| cpdb system -->|"runs on"| hw