solana-validator-optimizer

A production-grade Rust toolkit for Solana infrastructure diagnostics, validator optimization, RPC health checks, caching, metrics, and production-readiness workflows.

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Overview

solana-validator-optimizer is a modular enhancement suite for Solana validator infrastructure. It helps operators by:

• Prefetching ledger snapshots from trusted mirrors
• Validating snapshot integrity via SHA-256
• Auto-tuning validator configuration based on hardware resources
• Adding an in-memory LRU cache for frequently used RPC calls
• Exposing Prometheus metrics via a /metrics endpoint

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Compatibility

This project targets the Solana / Agave v3 validator era.

• Solana crate line: 3.0.x
• Recommended validator line: v3.0.14 (Mainnet-Beta recommended)
• Tested against:
  • Mainnet RPC: https://api.mainnet-beta.solana.com
  • solana-test-validator (local)

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Ideal For

• Solana Validator Operators
• RPC Infrastructure Maintainers
• Performance-Focused Mainnet/Devnet Deployments

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Core Features

Feature	Description
Snapshot Prefetching	Downloads or copies snapshots locally with optional SHA-256 validation
RPC LRU Cache	Reduces redundant RPC calls like getBalance, getEpochInfo, etc.
Prometheus Metrics	/metrics endpoint for cache hits, misses, request counts, and latency
Config Auto-Tuner	Adjusts validator configuration based on CPU, RAM, disk, and network
RPC Health Checker	Checks RPC endpoint health, Solana version, current slot, latest blockhash availability, and latency across key RPC calls

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Architecture

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Getting Started

1. Clone the Repository

git clone https://github.com/0rlych1kk4/solana-validator-optimizer.git
cd solana-validator-optimizer

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2. Configuration

Create a Config.toml file in the project root:

# Config.toml

# Snapshot settings
snapshot_url   = ""    # e.g. "https://snapshots.myvalidator.com/latest.tar.zst"
snapshot_sha256 = ""   # optional SHA-256 checksum for validation

# RPC and Metrics
rpc_url      = "https://api.mainnet-beta.solana.com"
metrics_port = 9090    # Prometheus scrapes at http://<host>:9090/metrics

# Cache settings
cache_size = 128       # Number of entries in the RPC LRU cache

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Usage – CLI Mode

Run all modules (snapshot, RPC cache, auto-tuner, metrics):

cargo run -p solana-validator-optimizer-cli --release

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Usage – As a Library

Add this to your Cargo.toml:

[dependencies]
solana-validator-optimizer = "1.2"
tokio = { version = "1", features = ["full"] }
anyhow = "1"

Example usage:

use solana_validator_optimizer::{
    config::AppConfig,
    snapshot_prefetcher,
    rpc_cache_layer,
    metrics,
    config_autotuner,
};

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // Load configuration from Config.toml and/or OPTIMIZER_* env vars
    let cfg = AppConfig::load()?;

    // Prefetch snapshot (no-op if snapshot_url is empty)
    snapshot_prefetcher::run(&cfg).await?;

    // Auto-tune configuration (currently informational)
    config_autotuner::autotune_config(&cfg).await?;

    // Start background RPC cache workers
    rpc_cache_layer::start_rpc_cache(&cfg).await?;

    // Start Prometheus metrics server (blocks)
    metrics::start_metrics_server(&cfg).await?;

    Ok(())
}

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Usage – RPC Health Checker

Check the configured Solana RPC endpoint from Config.toml:

cargo run -p solana-validator-optimizer-cli -- rpc-health

Example output:

Solana RPC Health Report
Endpoint: https://api.mainnet-beta.solana.com
Healthy: true
Health Status: ok
Solana Version: 4.0.0
Current Slot: 422507351
Latest Blockhash: C5cWMY4npRumFBVjaGF1Su3xQHyXshF7LL93S7yCo29m
getHealth Latency: 622 ms
getVersion Latency: 216 ms
getSlot Latency: 207 ms
getLatestBlockhash Latency: 306 ms

Use a custom endpoint:

cargo run -p solana-validator-optimizer-cli -- rpc-health \
  --endpoint https://api.mainnet-beta.solana.com

Output as JSON:

cargo run -p solana-validator-optimizer-cli -- rpc-health --json

The RPC Health Checker helps Solana infrastructure teams validate endpoint health, blockhash availability, and latency before transaction submission or production deployment.

Environment Variables

Any Config.toml value can be overridden using the OPTIMIZER_ prefix.

Config Key	Environment Variable
snapshot_url	OPTIMIZER_SNAPSHOT_URL
snapshot_sha256	OPTIMIZER_SNAPSHOT_SHA256
rpc_url	OPTIMIZER_RPC_URL
metrics_port	OPTIMIZER_METRICS_PORT
cache_size	OPTIMIZER_CACHE_SIZE

Example:

OPTIMIZER_RPC_URL=https://api.mainnet-beta.solana.com \
OPTIMIZER_CACHE_SIZE=256 \
cargo run --release

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Operational Metrics

Prometheus endpoint:

http://<host>:<metrics_port>/metrics

Exposed Metrics

• rpc_requests_total
• rpc_cache_hits_total
• rpc_cache_misses_total

Metrics

Enable Prometheus metrics endpoint:

cargo run -p solana-validator-optimizer-cli --release --features metrics -- --config Config.toml run
curl -s http://127.0.0.1:9090/metrics | grep rpc_

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Contributing

Contributions are welcome!
Feel free to open issues, feature requests, or pull requests.

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License

Licensed under the MIT License.