Database Replication — Reladraw template

数据库主从复制. Copy the source, paste into the official playground, done. No coordinates — every position is stated relative to something else.

Preview

Primary DB Replica 1 Replica 2 Replica 3 Backup stream stream stream nightly

Source (.reladraw)

node primary "Primary DB"
node repl1 "Replica 1"  below-left of primary
node repl2 "Replica 2"  below primary
node repl3 "Replica 3"  below-right of primary
node backup "Backup"  right of primary
edge primary -> repl1 "stream"
edge primary -> repl2 "stream"
edge primary -> repl3 "stream"
edge primary -> backup "nightly"

How to use

  1. Open the Reladraw playground
  2. Paste the source above — the diagram re-solves live
  3. Export SVG from the playground, or render locally: npx reladraw db-replication.reladraw -o out.svg

When to use this template

One primary streaming to three replicas plus a nightly backup path.. Use it in DR planning docs — failover is one node away, and the picture makes that obvious.

How to customize

  1. Add a step or node. Insert one line: node new_id 'New label' below anchor — placement is relative, so the solver re-flows the whole diagram instantly.
  2. Relabel an edge. Edit the text after the arrow: edge a -> b 'your label' — labels are the fastest way to carry rates, protocols or percentages.
  3. Change reading order. Swap a placement word: below to right of rotates a branch sideways without touching any other line.

FAQ

How do I draw this in Reladraw?

Declare each box with node, connect them with edge, and state one position per node relative to another. Paste the source from this page into the official playground and it renders immediately.

Can I use this template commercially?

Yes — the source is free to copy, modify and ship in docs, READMEs, books or client decks. No attribution required.

How do I export an image?

Render in the playground and export SVG, or run it locally: npx reladraw file.reladraw -o out.svg for CI-friendly builds.

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