126 lines
5.4 KiB
Markdown
126 lines
5.4 KiB
Markdown
# gossip-dashboard
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Interactive web dashboard for visualizing gossip protocol simulations.
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The workflow has two steps:
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1. **Generate traces** -- run simulations against TOML config files, producing `.trace.json` files.
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2. **Replay traces** -- start the dashboard server, point it at a directory of traces, and explore them in the browser.
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## Quick start
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```bash
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# 1. Generate traces from the bundled configs (outputs to traces/)
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cargo run -p gossip-dashboard --example generate_traces
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# 2. Launch the dashboard
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cargo run -p gossip-dashboard --example replay -- traces
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# => open http://localhost:8080
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```
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## Commands
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### `generate_traces`
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Runs gossip simulations and writes `.trace.json` files.
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```
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generate_traces # all bundled configs -> traces/
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generate_traces <out-dir> # all bundled configs -> <out-dir>/
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generate_traces <out-dir> <config.toml> [more.toml …] # specific configs -> <out-dir>/
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```
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Bundled configs live in `examples/configs/`. When no config paths are given, every `.toml` in that directory is run.
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Output filenames are derived from the simulation name (lowercased, spaces to underscores). Example output:
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```
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traces/
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ring_10_nodes.trace.json
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star_7_nodes.trace.json
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chain_8_nodes.trace.json
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full_mesh_6_nodes.trace.json
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partition_&_heal_8_nodes.trace.json
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```
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### `replay`
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Starts an HTTP server that serves the dashboard UI and the trace data.
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```
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replay <trace-dir> [port]
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```
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| Argument | Required | Default | Description |
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|-------------|----------|---------|------------------------------------------|
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| `trace-dir` | yes | -- | Directory containing `.trace.json` files |
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| `port` | no | 8080 | Port to bind on |
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The server exposes three endpoints:
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| Route | Description |
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|--------------------------|------------------------------------|
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| `GET /` | Dashboard HTML |
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| `GET /traces` | JSON list of available trace files |
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| `GET /trace.json?file=…` | Fetch a specific trace |
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## Configuration (TOML)
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Each simulation is defined by a TOML file. Example (`ring_10.toml`):
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```toml
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name = "Ring (10 nodes)"
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topology = "ring"
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num_nodes = 10
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num_rounds = 15
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ticks_per_round = 5
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num_threads = 1
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[initial_data]
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color = "blue"
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version = "1"
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status = "active"
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```
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### Fields
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| Field | Type | Required | Description |
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|--------------------|-------------------|----------|-------------------------------------------------------------------|
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| `name` | string | yes | Display name for the simulation |
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| `topology` | string | yes | Network topology (see below) |
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| `num_nodes` | integer | yes | Number of gossip nodes |
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| `num_rounds` | integer | yes | Number of gossip rounds to run |
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| `ticks_per_round` | integer | yes | Simulation ticks per round |
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| `num_threads` | integer | yes | Worker threads (`1` = deterministic single-threaded) |
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| `heal_after_round` | integer | no | Round after which partitioned halves are bridged |
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| `initial_data` | table of strings | no | Key-value pairs seeded on node 0 before gossip begins |
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### Topologies
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| Value | Shape |
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|---------------|--------------------------------------------------------------------------|
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| `ring` | Each node connects to the next, forming a circle |
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| `star` | Node 0 is a hub with bidirectional links to every other node |
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| `full_mesh` | Every node connects bidirectionally to every other node |
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| `chain` | Unidirectional chain: node 0 -> 1 -> 2 -> ... -> N-1 |
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| `partitioned` | Two isolated full-mesh halves; use `heal_after_round` to bridge them |
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## Bundled configs
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| File | Topology | Nodes | Rounds | Notes |
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|---------------------------|-------------|-------|--------|----------------------------|
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| `ring_10.toml` | ring | 10 | 15 | |
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| `star_7.toml` | star | 7 | 10 | |
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| `full_mesh_6.toml` | full_mesh | 6 | 8 | |
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| `chain_8.toml` | chain | 8 | 20 | |
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| `partitioned_8_heal.toml` | partitioned | 8 | 20 | Heals after round 10 |
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## Dashboard UI
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Once a trace is loaded in the browser:
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- **Graph canvas** -- nodes arranged in a circle then refined with force-directed layout. Nodes and edges flash as events are replayed.
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- **Stats panel** -- total nodes, edges, messages, current round.
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- **Worker logs** -- per-thread activity feed.
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- **Event table** -- full event log with columns: Seq, Round, Thread, Node, Event, Details.
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- **Playback controls** -- First / Prev / Play / Pause / Next / Last, timeline slider, speed adjustment (10 ms -- 2000 ms per event).
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