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HeliosDB HeliosDB Nano

Mode Selection Guide

Mode Selection Guide

Applies to: HeliosDB Nano 4.31.1

This guide has been merged into a single canonical page so that there is one description of how Nano is deployed rather than several competing ones.

See Deployment Modes. It covers, in one taxonomy:

  • Storage mode — persistent vs. in-memory.
  • Access mode — embedded library API, interactive REPL, foreground server, background daemon.
  • How to choose, with the real CLI flags and configuration keys.
  • Why a data directory is owned by exactly one process, and what that means for moving between modes.
  • What running a server and a REPL side by side actually gives you (two processes, two separate data directories — not shared access to one dataset).

For what is safe to do from several callers at once, see Concurrency and transactions.