❄️ SnowID Rust

A Rust implementation of a Snowflake-like ID generator with 42-bit timestamp.

Generate 64-bit unique identifiers that are:

• ⚡️ Fast (~244ns per ID)
• 📈 Time-sorted
• 🔄 Monotonic
• 🔒 Thread-safe
• 🌐 Distributed-ready
• 🎯 Zero dependencies

🧮 ID Structure

Example ID: 151819733950271234

Default configuration:

|------------------------------------------|------------|------------|
|           TIMESTAMP (42 bits)            | NODE (10)  |  SEQ (12)  |
|------------------------------------------|------------|------------|

• Timestamp: 42 bits = 139 years from 2024-01-01 (1704067200000)
• Node ID: 10 bits = 1,024 nodes (valid range: 6-16 bits)
• Sequence: 12 bits = 4,096 IDs/ms/node

🎯 Quick Start

[dependencies]
snowid = "0.1.3"

use snowid::SnowID;

fn main() {
    let gen = SnowID::new(1).unwrap();
    let id = gen.generate();
    println!("Generated ID: {}", id);
}

🔧 Configuration

use snowid::{SnowID, SnowIDConfig};

fn main() {
    // Create custom configuration
    let config = SnowIDConfig::builder()
        .epoch(1577836800000) // 2020-01-01 00:00:00 UTC
        .node_bits(8)         // Supports 255 nodes
        .build();

    // Create generator with custom config
    let gen = SnowID::with_config(1, config).unwrap();
}

ℹ️ Available Methods

use snowid::SnowID;

fn main() {
    let gen = SnowID::new(1).unwrap();
    let id = gen.generate();

    // Extract individual components
    let timestamp = gen.extract.timestamp(id);  // Get timestamp from ID
    let node = gen.extract.node(id);           // Get node ID from ID
    let sequence = gen.extract.sequence(id);    // Get sequence from ID

    // Extract all components at once
    let (ts, node, seq) = gen.extract.decompose(id);

    // Configuration information
    let max_node = gen.max_node_id();          // Get maximum allowed node ID
    let node_bits = gen.node_bits();           // Get number of bits used for node ID
    let max_seq = gen.config.max_sequence_id();    // Get maximum sequence per millisecond
    let timestamp_bits = SnowID::TIMESTAMP_BITS; // Get number of bits used for timestamp (42)
}

📊 Performance & Comparisons

Social Media Platform Configurations

Node vs Sequence Bits Trade-off

Choose configuration based on your needs:

• More nodes → Increase node bits (max 16 bits = 65,536 nodes)
• More IDs per node → Increase sequence bits (min 6 node bits = 64 nodes)
• Total bits (node + sequence) is fixed at 22 bits

🚀 Examples

Check out examples for:

• Basic usage
• Custom configuration
• Distributed generation
• Performance benchmarks

📜 License

MIT - See LICENSE for details