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Out-Components

Find all nodes reachable from a source

Out-components identifies all nodes reachable FROM a specific source node (where can the source reach).

What It Computes

Given a source node, returns the set of all nodes reachable from it (following edge direction).

When to Use It

  • Blast radius: "If this fails, what breaks?"
  • Propagation analysis: "What can this node influence?"
  • Reachability: "What's accessible from here?"

Parameters

ParameterTypeDescription
sourcenode/strSource node to analyze

Performance

Time: O(V + E) per query
Scales to: 10M+ edges

Example

Use Cases

Blast Radius Analysis

If this service fails, what else is affected?

Attack Surface

From compromised host, what can attacker reach?

Dependency Chains

Map full downstream dependency tree

Out-Component vs In-Component

Out-component: Nodes reachable FROM source (downstream)
In-component: Nodes that can reach target (upstream)

Example:

  • Out-component(Source): {B, C, D, E}
  • In-component(E): {Source, D}

Temporal Out-Components

Track how reachability evolves:

See Also