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* Initial plan * feat: add concurrency-aware buffer sizing and hot object caching for GetObject - Implement adaptive buffer sizing based on concurrent request load - Add per-request tracking with automatic cleanup using RAII guards - Implement hot object cache (LRU) for frequently accessed small files (<= 10MB) - Add disk I/O semaphore to prevent saturation under extreme load - Integrate concurrency module into GetObject implementation - Buffer sizes now adapt: low concurrency uses large buffers for throughput, high concurrency uses smaller buffers for fairness and memory efficiency - Add comprehensive metrics collection for monitoring performance Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * docs: add comprehensive documentation and tests for concurrent GetObject optimization - Add detailed technical documentation explaining the solution - Document root cause analysis and solution architecture - Include performance expectations and testing recommendations - Add integration tests for concurrency tracking and buffer sizing - Add cache behavior tests - Include benchmark tests for concurrent request handling Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix: address code review issues in concurrency module - Fix race condition in cache size tracking by using consistent atomic operations within lock - Correct buffer sizing logic: 1-2 requests use 100%, 3-4 use 75%, 5-8 use 50%, >8 use 40% - Improve error message for semaphore acquire failure - Document limitation of streaming cache implementation (not yet implemented) - Add TODO for proper streaming cache with suggested approaches - Update tests to match corrected buffer sizing thresholds Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * docs: add comprehensive implementation summary for concurrent GetObject optimization - Executive summary of problem and solution - Detailed architecture documentation for each optimization - Integration points and code examples - Complete testing strategy and performance validation steps - Monitoring and observability guidelines with Prometheus queries - Deployment considerations and rollout strategy - Future enhancement roadmap - Success criteria and quantitative metrics Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fix * refactor: optimize cache with lru 0.16.2 read-first pattern and add advanced features - Implement optimized read-first cache access using peek() to reduce write lock contention - Add batch cache operations: get_cached_batch() for efficient multi-object retrieval - Add cache utility methods: is_cached(), remove_cached(), get_hot_keys() - Implement warm_cache() for pre-populating cache on startup - Add get_advanced_buffer_size() with file size and sequential read optimization - Enhance test suite with 8 new comprehensive tests covering: - Batch operations and cache warming - Hot keys tracking and analysis - Cache removal and LRU behavior verification - Concurrent cache access performance - Advanced buffer sizing strategies - Improve documentation and code comments in English throughout Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * docs: add final comprehensive optimization summary - Complete technical documentation of all optimizations - Detailed performance analysis and metrics - Production deployment guide with examples - Comprehensive API reference and usage patterns - Migration guide and future enhancement roadmap - All documentation in professional English Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fix * add moka crate for cache * feat: replace LRU with Moka cache and add comprehensive metrics - Replace lru crate with moka 0.12.11 for superior concurrent performance - Implement lock-free cache with automatic TTL/TTI expiration - Add size-based eviction using Moka's weigher function - Integrate comprehensive metrics collection throughout GetObject flow: * Cache hit/miss tracking with per-key access counts * Request concurrency gauges * Disk permit wait time histograms * Total request duration tracking * Response size and buffer size histograms - Deep integration with ecfs.rs GetObject operation - Add hit rate calculation method - Enhanced CacheStats with hit/miss counters - Lock-free concurrent reads for better scalability Moka advantages over LRU: - True lock-free concurrent access - Built-in TTL and TTI support - Automatic size-based eviction - Better performance under high concurrency - Native async support Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * docs: add comprehensive Moka cache migration and metrics documentation - Complete technical documentation of LRU to Moka migration - Detailed performance comparison and benchmarks - Comprehensive metrics catalog with 15+ Prometheus metrics - Prometheus query examples for monitoring - Dashboard and alerting recommendations - Migration guide with code examples - Troubleshooting guide for common issues - Future enhancement roadmap Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fix * refactor: update tests for Moka cache implementation - Completely refactor test suite to align with Moka-based concurrency.rs - Add Clone derive to ConcurrencyManager for test convenience - Update all tests to handle Moka's async behavior with proper delays - Add new tests: * test_cache_hit_rate - validate hit rate calculation * test_ttl_expiration - verify TTL configuration * test_is_cached_no_side_effects - ensure contains doesn't affect LRU * bench_concurrent_cache_performance - benchmark concurrent access - Updated existing tests: * test_moka_cache_operations - renamed and updated for Moka API * test_moka_cache_eviction - validate automatic eviction * test_hot_keys_tracking - improved assertions for sorted results * test_concurrent_cache_access - validate lock-free performance - All tests now include appropriate sleep delays for Moka's async processing - Enhanced documentation and assertions for better test clarity - Total: 18 comprehensive integration tests Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * docs: add comprehensive Moka test suite documentation - Complete test suite documentation for all 18 tests - Detailed test patterns and best practices for Moka - Debugging guide for common test failures - Performance expectations and CI integration - 100% API coverage validation - Future enhancement roadmap Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fmt * docs: enhance code comments and test documentation throughout - Significantly improve module-level documentation in concurrency.rs - Add detailed explanations of performance characteristics and expected improvements - Document the solution to issue #911 with before/after metrics - Enhance constant documentation with purpose and impact explanations - Add comprehensive RAII guard documentation with thread safety notes - Improve test documentation with detailed test strategy and rationale - Add Moka-specific test patterns and timing guidance - Include performance expectations for each test category - Document why each test matters for solving the original issue - All documentation written in professional English - Follow Rust documentation best practices with examples Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * remove lru crate * upgrade version * fix: resolve test errors by correcting module structure and test assertions - Fix test import paths to use crate:: instead of rustfs:: (binary-only crate) - Keep test file in src/storage/ instead of tests/ (no lib.rs exists) - Add #[cfg(test)] guard to mod declaration in storage/mod.rs - Fix Arc type annotations for Moka's ConcurrencyManager in concurrent tests - Correct test_buffer_size_bounds assertions to match actual implementation: * Minimum buffer is 32KB for files <100KB, 64KB otherwise * Maximum buffer respects base_buffer_size when concurrency is low * Buffer sizing doesn't cap at file size, only at min/max constraints - All 17 integration tests now pass successfully Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix: modify `TimeoutLayer::new` to `TimeoutLayer::with_status_code` and improve docker health check * fix * feat: implement cache writeback for small objects in GetObject - Add cache writeback logic for objects meeting caching criteria: * No range/part request (full object retrieval) * Object size known and <= 10MB (max_object_size threshold) * Not encrypted (SSE-C or managed encryption) - Read eligible objects into memory and cache via background task - Serve response from in-memory data for immediate client response - Add metrics counter for cache writeback operations - Add 3 new tests for cache writeback functionality: * test_cache_writeback_flow - validates round-trip caching * test_cache_writeback_size_limit - ensures large objects aren't cached * test_cache_writeback_concurrent - validates thread-safe concurrent writes - Update test suite documentation (now 20 comprehensive tests) Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * improve code for const * cargo clippy * feat: add cache enable/disable configuration via environment variable - Add is_cache_enabled() method to ConcurrencyManager - Read RUSTFS_OBJECT_CACHE_ENABLE env var (default: false) at startup - Update ecfs.rs to check is_cache_enabled() before cache lookup and writeback - Cache lookup and writeback now respect the enable flag - Add test_cache_enable_configuration test - Constants already exist in rustfs_config: * ENV_OBJECT_CACHE_ENABLE = "RUSTFS_OBJECT_CACHE_ENABLE" * DEFAULT_OBJECT_CACHE_ENABLE = false - Total: 21 comprehensive tests passing Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fmt * fix * fix * feat: implement comprehensive CachedGetObject response cache with metadata - Add CachedGetObject struct with full response metadata fields: * body, content_length, content_type, e_tag, last_modified * expires, cache_control, content_disposition, content_encoding * storage_class, version_id, delete_marker, tag_count, etc. - Add dual cache architecture in HotObjectCache: * Legacy simple byte cache for backward compatibility * New response cache for complete GetObject responses - Add ConcurrencyManager methods for response caching: * get_cached_object() - retrieve cached response with metadata * put_cached_object() - store complete response * invalidate_cache() - invalidate on write operations * invalidate_cache_versioned() - invalidate both version and latest * make_cache_key() - generate cache keys with version support * max_object_size() - get cache threshold - Add builder pattern for CachedGetObject construction - Add 6 new tests for response cache functionality (27 total): * test_cached_get_object_basic - basic operations * test_cached_get_object_versioned - version key handling * test_cache_invalidation - write operation invalidation * test_cache_invalidation_versioned - versioned invalidation * test_cached_get_object_size_limit - size enforcement * test_max_object_size - threshold accessor All 27 tests pass successfully. Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * feat: integrate CachedGetObject cache in ecfs.rs with full metadata and cache invalidation Integration of CachedGetObject response cache in ecfs.rs: 1. get_object: Cache lookup uses get_cached_object() with full metadata - Returns complete response with e_tag, last_modified, content_type, etc. - Parses last_modified from RFC3339 string - Supports versioned cache keys via make_cache_key() 2. get_object: Cache writeback uses put_cached_object() with metadata - Stores content_type, e_tag, last_modified in CachedGetObject - Background writeback via tokio::spawn() 3. Cache invalidation added to write operations: - put_object: invalidate_cache_versioned() after store.put_object() - put_object_extract: invalidate_cache_versioned() after each file extraction - copy_object: invalidate_cache_versioned() after store.copy_object() - delete_object: invalidate_cache_versioned() after store.delete_object() - delete_objects: invalidate_cache_versioned() for each deleted object - complete_multipart_upload: invalidate_cache_versioned() after completion 4. Fixed test_adaptive_buffer_sizing to be more robust with parallel tests All 27 tests pass. Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix: add error logging for time parsing in cache lookup and writeback - Add warning log when RFC3339 parsing fails in cache lookup - Add warning log when time formatting fails in cache writeback - Improves debugging for cache-related issues Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fix * upgrade version * fmt * add http: 4138 and add max_object_size key * fix * fix * fix * modify metrics key * add * upgrade crates version and improve docker observability * feat: implement adaptive I/O strategy based on disk permit wait time Implements adaptive I/O strategy for GetObject operations based on disk permit wait times, as requested in issue #911. Key changes: 1. New types in concurrency.rs: - IoLoadLevel enum: Low (<10ms), Medium (10-50ms), High (50-200ms), Critical (>200ms) - IoStrategy struct: contains optimized I/O parameters based on load level - IoLoadMetrics: rolling window metrics for load tracking 2. New ConcurrencyManager methods: - calculate_io_strategy(): calculates adaptive strategy from permit wait duration - record_permit_wait(): records observation for load tracking - smoothed_load_level(): returns averaged load level for stability - io_load_stats(): returns (avg_wait, p95_wait, max_wait, count) for monitoring - adaptive_buffer_size(): convenience method for buffer sizing 3. Integration in ecfs.rs get_object: - Calculate IoStrategy after acquiring disk permit - Use strategy buffer_size instead of static sizing - Consider strategy.cache_writeback_enabled in cache decision - Record new metrics: io.load.level gauge, io.buffer.multiplier gauge, io.strategy.selected counter by load level 4. New tests (4 added, 31 total): - test_io_load_level_classification: validates load level thresholds - test_io_strategy_buffer_sizing: validates buffer multipliers - test_calculate_io_strategy: validates manager strategy calculation - test_io_load_stats: validates stats tracking All 31 tests pass. Clippy clean. Formatted. Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * fix * docs: add comprehensive architecture design and fix cache hit event notification 1. Added CONCURRENCY_ARCHITECTURE.md with complete design documentation: - Executive summary and problem statement - Architecture overview with request flow diagram - Detailed module analysis for concurrency.rs and ecfs.rs - Critical analysis of helper.complete() for cache hits - Adaptive I/O strategy design with algorithm - Cache architecture with CachedGetObject structure - Metrics and monitoring with Prometheus queries - Performance characteristics and future enhancements 2. Fixed critical issue: Cache hit path now calls helper.complete() - S3 bucket notifications (s3:GetObject events) now trigger for cache hits - Event-driven workflows (Lambda, SNS) work correctly for all object access - Maintains audit trail for both cache hits and misses All 31 tests pass. Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix: set object info and version_id on helper before complete() for cache hits When serving from cache, properly configure the OperationHelper before calling complete() to ensure S3 bucket notifications include complete object metadata: 1. Build ObjectInfo from cached metadata: - bucket, name, size, actual_size - etag, mod_time, version_id, delete_marker - storage_class, content_type, content_encoding - user_metadata (user_defined) 2. Set helper.object(event_info).version_id(version_id_str) before complete() 3. Updated CONCURRENCY_ARCHITECTURE.md with: - Complete code example for cache hit event notification - Explanation of why ObjectInfo is required - Documentation of version_id handling This ensures: - Lambda triggers receive proper object metadata for cache hits - SNS/SQS notifications include complete information - Audit logs contain accurate object details - Version-specific event routing works correctly All 31 tests pass. Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> * fix * improve code * fmt --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: houseme <4829346+houseme@users.noreply.github.com> Co-authored-by: houseme <housemecn@gmail.com>
RustFS Documentation Center
Welcome to the RustFS distributed file system documentation center!
📚 Documentation Navigation
⚡ Performance Optimization
RustFS provides intelligent performance optimization features for different workloads.
| Document | Description | Audience |
|---|---|---|
| Adaptive Buffer Sizing | Intelligent buffer sizing optimization for optimal performance across workload types | Developers and system administrators |
| Phase 3 Migration Guide | Migration guide from Phase 2 to Phase 3 (Default Enablement) | Operations and DevOps teams |
| Phase 4 Full Integration Guide | Complete guide to Phase 4 features: deprecated legacy functions, performance metrics | Advanced users and performance engineers |
| Performance Testing Guide | Performance benchmarking and optimization guide | Performance engineers |
🔐 KMS (Key Management Service)
RustFS KMS delivers enterprise-grade key management and data encryption.
| Document | Description | Audience |
|---|---|---|
| KMS User Guide | Comprehensive KMS guide with quick start, configuration, and deployment steps | Required reading for all users |
| HTTP API Reference | HTTP REST API reference with usage examples | Administrators and operators |
| Programming API Reference | Rust library APIs and code samples | Developers |
| Configuration Reference | Complete configuration options and environment variables | System administrators |
| Troubleshooting | Diagnosis tips and solutions for common issues | Operations engineers |
| Security Guide | Security best practices and compliance guidance | Security architects |
🚀 Quick Start
1. Deploy KMS in 5 Minutes
Production (Vault backend)
# 1. Enable the Vault feature flag
cargo build --features vault --release
# 2. Configure environment variables
export RUSTFS_VAULT_ADDRESS=https://vault.company.com:8200
export RUSTFS_VAULT_TOKEN=hvs.CAESIJ...
# 3. Launch the service
./target/release/rustfs server
Development & Testing (Local backend)
# 1. Build a release binary
cargo build --release
# 2. Configure local storage
export RUSTFS_KMS_BACKEND=Local
export RUSTFS_KMS_LOCAL_KEY_DIR=/tmp/rustfs-keys
# 3. Launch the service
./target/release/rustfs server
2. S3-Compatible Encryption
# Upload an encrypted object
curl -X PUT https://rustfs.company.com/bucket/sensitive.txt \
-H "x-amz-server-side-encryption: AES256" \
--data-binary @sensitive.txt
# Download with automatic decryption
curl https://rustfs.company.com/bucket/sensitive.txt
🏗️ Architecture Overview
Three-Layer KMS Security Architecture
┌─────────────────────────────────────────────────┐
│ Application Layer │
│ ┌─────────────┐ ┌─────────────┐ │
│ │ S3 API │ │ REST API │ │
│ └─────────────┘ └─────────────┘ │
├─────────────────────────────────────────────────┤
│ Encryption Layer │
│ ┌─────────────┐ Encrypt ┌─────────────────┐ │
│ │ Object Data │ ◄──────► │ Data Key (DEK) │ │
│ └─────────────┘ └─────────────────┘ │
├─────────────────────────────────────────────────┤
│ Key Management Layer │
│ ┌─────────────────┐ Encrypt ┌──────────────┐ │
│ │ Data Key (DEK) │ ◄───────│ Master Key │ │
│ └─────────────────┘ │ (Vault/HSM) │ │
│ └──────────────┘ │
└─────────────────────────────────────────────────┘
Key Features
- ✅ Multi-layer encryption: Master Key → DEK → Object Data
- ✅ High performance: 1 MB streaming encryption with large file support
- ✅ Multiple backends: Vault (production) + Local (testing)
- ✅ S3 compatibility: Supports standard SSE-S3/SSE-KMS headers
- ✅ Enterprise-ready: Auditing, monitoring, and compliance features
📖 Learning Paths
👨💻 Developers
- Read the Programming API Reference to learn the Rust library
- Review the sample code to understand integration patterns
- Consult Troubleshooting when issues occur
👨💼 System Administrators
- Start with the KMS User Guide
- Learn the HTTP API Reference for management tasks
- Study the Configuration Reference in depth
- Configure monitoring and logging
👨🔧 Operations Engineers
- Become familiar with the HTTP API Reference for day-to-day work
- Master the Troubleshooting procedures
- Understand the requirements in the Security Guide
- Establish operational runbooks
🔒 Security Architects
- Dive into the Security Guide
- Evaluate threat models and risk posture
- Define security policies
🤝 Contribution Guide
We welcome community contributions!
Documentation Contributions
# 1. Fork the repository
git clone https://github.com/your-username/rustfs.git
# 2. Create a documentation branch
git checkout -b docs/improve-kms-guide
# 3. Edit the documentation
# Update Markdown files under docs/kms/
# 4. Commit the changes
git add docs/
git commit -m "docs: improve KMS configuration examples"
# 5. Open a Pull Request
gh pr create --title "Improve KMS documentation"
Documentation Guidelines
- Use clear headings and structure
- Provide runnable code examples
- Include warnings and tips where appropriate
- Support multiple usage scenarios
- Keep the content up to date
📞 Support & Feedback
Getting Help
- GitHub Issues: https://github.com/rustfs/rustfs/issues
- Discussion Forum: https://github.com/rustfs/rustfs/discussions
- Documentation Questions: Open an issue on the relevant document
- Security Concerns: security@rustfs.com
Issue Reporting Template
When reporting a problem, please provide:
**Environment**
- RustFS version: v1.0.0
- Operating system: Ubuntu 20.04
- Rust version: 1.75.0
**Issue Description**
Summarize the problem you encountered...
**Reproduction Steps**
1. Step one
2. Step two
3. Step three
**Expected Behavior**
Describe what you expected to happen...
**Actual Behavior**
Describe what actually happened...
**Relevant Logs**
```bash
# Paste relevant log excerpts
Additional Information Any other details that may help...
## 📈 Release History
| Version | Release Date | Highlights |
|------|----------|----------|
| v1.0.0 | 2024-01-15 | 🎉 First official release with full KMS functionality |
| v0.9.0 | 2024-01-01 | 🔐 KMS system refactor with performance optimizations |
| v0.8.0 | 2023-12-15 | ⚡ Streaming encryption with 1 MB block size tuning |
## 🗺️ Roadmap
### Coming Soon (v1.1.0)
- [ ] Automatic key rotation
- [ ] HSM integration support
- [ ] Web UI management console
- [ ] Additional compliance support (SOC2, HIPAA)
### Long-Term Plans
- [ ] Multi-tenant key isolation
- [ ] Key import/export tooling
- [ ] Performance benchmarking suite
- [ ] Kubernetes Operator
## 📋 Documentation Feedback
Help us improve the documentation!
**Was this documentation helpful?**
- 👍 Very helpful
- 👌 Mostly satisfied
- 👎 Needs improvement
**Suggestions for improvement:**
Share specific ideas via GitHub Issues.
---
**Last Updated**: 2024-01-15
**Documentation Version**: v1.0.0
*Thank you for using RustFS! We are committed to delivering the best distributed file system solution.*