Crate rusmes_loadtest 

rusmes-loadtest

Multi-protocol load testing tool for the RusMES Rust Mail Enterprise Server.

This crate provides the rusmes-loadtest binary, capable of generating realistic, high-throughput email traffic across SMTP, IMAP, JMAP, and POP3 protocols simultaneously, while collecting detailed latency and throughput metrics.

Features

• Multi-protocol — SMTP, IMAP, JMAP, POP3, and configurable mixed-protocol scenarios
• Configurable scenarios — SMTP throughput, concurrent connections, mixed protocol, and sustained-load test patterns
• Flexible workload patterns — steady, spike, ramp-up, stress, and wave patterns
• HDR histogram latency — precise percentile reporting (p50, p95, p99, p99.9) via hdrhistogram
• Report generation — JSON, HTML, and CSV output; Prometheus metrics export
• Realistic message generation — random sizes, template-based, and real-world content types

Example

# 60-second SMTP throughput test at 200 msg/s with 20 workers
rusmes-loadtest --host mail.example.com --port 25 \
    --protocol smtp --scenario smtp-throughput \
    --duration 60 --concurrency 20 --rate 200 \
    --output-json /tmp/results.json --output-html /tmp/results.html

Architecture

The main entry point is LoadTester, which takes a LoadTestConfig and orchestrates concurrent workers via Tokio tasks. Each worker calls into a protocol-specific client (protocols::SmtpClient, protocols::ImapClient, …) and records results into a shared LoadTestMetrics protected by an Arc<RwLock<…>>.

Re-exports

pub use config::LoadTestConfig;

pub use metrics::LatencyStats;

pub use metrics::LoadTestMetrics;

pub use scenarios::LoadTestScenario;

pub use scenarios::ScenarioRunner;

Modules

config

Load test configuration

generators

Message generators for load testing

metrics

Load test metrics collection and reporting

protocols

Protocol clients for load testing

reporter

Report generation for load test results

scenarios

Load test scenarios

workload

Workload patterns for load testing

Structs

LoadTester

Main load test coordinator