The Big Picture
Not all registered neurons are actively participating. Some may be offline, misconfigured, or abandoned. Active tracks which neurons are currently contributing to the subnet - receiving queries, setting weights, or otherwise participating.
Why This Matters
Is this neuron actually doing anything? Active tells you if they're participating. Inactive neurons take up slots but don't contribute - they're pruning candidates.
Example Scenario
Query Active(netuid=1, uid=47) returns true/false. True means this neuron is actively participating. False suggests they're dormant - not serving, not setting weights.
Common Questions
- How is activity determined?
- Based on recent actions - serving requests, setting weights, etc. The specific criteria depends on subnet configuration (ActivityCutoff).
- Does inactive mean they'll be pruned?
- Inactivity contributes to lower pruning scores. Consistently inactive neurons are more likely to be replaced by new registrations.
- Can a neuron become active again?
- Yes, resume operations and activity status updates. It's not permanent - just reflects recent behavior.
Use Cases
- Check if a neuron is currently active
- Filter leaderboards to show only active neurons
- Calculate subnet utilization rates
- Identify dormant neurons for pruning consideration
- Build health dashboards showing active participation
Purpose & Usage
Purpose
Track neuron activity status - identifies neurons currently participating vs dormant.
Common Query Patterns
- Query by netuid-uid
- Filter active neurons for analysis
- Count active vs inactive neurons
Query Keys
| # | Name | Type | Description |
|---|---|---|---|
| 1 | key1 | u16 | key1 (u16) |
Stored Value
value (Vec<bool>)
Relationships
Modified By
Related Events
Code Examples
import { ApiPromise, WsProvider } from "@polkadot/api";
import { stringCamelCase } from "@polkadot/util";
const provider = new WsProvider("wss://entrypoint-finney.opentensor.ai:443");
const api = await ApiPromise.create({ provider });
// Query Active storage
const key1 = 0;
const result = await api.query
[stringCamelCase("SubtensorModule")]
[stringCamelCase("Active")](
key1
);
console.log("Active:", result.toHuman());On-Chain Activity
100K–1M estimated writes
#30 most written storage item
Modified by both user extrinsics and runtime hooks
As of block 7,429,232
Runtime Info
View Source- Pallet
- SubtensorModule
- Storage Kind
- Map
- First Version
- v101
- Current Version
- v393