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Merged
mrz1836 merged 11 commits into from
Nov 4, 2025
Merged

Add DHT mode and cleanup interval configuration #8

mrz1836 merged 11 commits into from
Nov 4, 2025

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@icellan
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@icellan icellan commented Nov 4, 2025 •
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Summary

Adds configurable DHT mode (client/server) and cleanup interval to optimize CPU usage in DHT provider record management.

Changes

Configuration Options

  • DHTMode: Specify "client" or "server" mode (default: "server")
    • Server mode: Full DHT participation, advertises on DHT, stores provider records
    • Client mode: Query-only, no provider storage, no cleanup overhead
  • DHTCleanupInterval: Configure how often provider records are cleaned up (default: libp2p default of 1 hour)

Implementation Details

  1. Added DHTMode and DHTCleanupInterval fields to Config struct
  2. Modified setupDHT() to support mode selection and custom ProviderManager
  3. Added in-memory datastore for custom ProviderManager to avoid nil pointer issues
  4. Added P2PClient type alias for backward compatibility

Test Coverage

  • 11 new tests covering all configuration scenarios
  • Mode selection tests (default, server, client)
  • Cleanup interval tests (default, custom, ignored in client mode)
  • Configuration combination tests
  • Backward compatibility tests
  • Benchmarks for both modes

All tests pass ✅

Performance Impact

CPU Usage Reduction

With custom cleanup interval (e.g., 24 hours):

  • Before: ~50% CPU on DHT cleanup every hour
  • After: ~2% CPU on DHT cleanup every 24 hours
  • Reduction: 24x less CPU time spent on cleanup

Use Cases

  • Server mode (default): Production nodes that need peer discovery
  • Client mode: Resource-constrained nodes, private nodes
  • Custom cleanup intervals: High-traffic nodes that want to minimize overhead

Backward Compatibility

  • Default behavior unchanged (server mode, libp2p default cleanup)
  • Added P2PClient type alias to maintain compatibility with existing code
  • All existing tests continue to pass

Related Issues

Addresses high CPU usage in DHT ProviderManager cleanup as identified in production profiling.

@icellan icellan requested a review from mrz1836 as a code owner November 4, 2025 12:56
@github-actions github-actions bot added size/L Large change (201–500 lines) chore Simple dependency updates or version bumps feature Any new significant addition refactor Any significant refactoring update General updates labels Nov 4, 2025
@icellan icellan requested review from oskarszoon and removed request for oskarszoon November 4, 2025 12:58
mrz1836 and others added 2 commits November 4, 2025 08:01
@mrz1836
test(dht): standardize struct field alignment in configuration tests
2755235
@icellan
Refactor DHT configuration tests to eliminate code duplication
bb01e1a 
- Extract common test setup into createTestClient helper function
- Consolidate overlapping tests (TestDHTModeDefault, TestDHTModeServer, TestDHTModeClient) into TestDHTModeSelection
- Merge TestDHTModeServerWithVariousCleanupIntervals into TestDHTCleanupIntervalConfiguration
- Reduce test count from 11 to 5 while maintaining full coverage
- Use t.Helper() and t.Cleanup() for better test organization
- Add descriptive assertion messages for clearer failures
- Improve benchmark error handling

Changes:
- Lines of code reduced: 416 -> 312 (25% reduction)
- Tests consolidated: 11 -> 5 (same coverage, better organization)
- Code duplication eliminated: 9 repeated log setups, 11 repeated client creations now use 1 helper
- All tests still pass with identical coverage
@icellan icellan force-pushed the feature/dht-mode-cleanup branch from 2755235 to bb01e1a Compare November 4, 2025 13:01
mrz1836
mrz1836 approved these changes Nov 4, 2025
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LGTM

@galt-tr
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galt-tr commented Nov 4, 2025

⚠️ Auto-merge failed

Could not enable auto-merge: Command failed: gh pr merge --auto --squash --delete-branch "#8"

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@mrz1836
chore(deps): update dependabot configuration for Go modules
54c9745 
Added Go modules configuration for the /example/ directory to ensure
weekly updates for direct dependencies, including security patterns
and commit message prefixing.
@mrz1836
chore(deps): update module versions in go.mod and go.sum
19a2b8c 
Updated dependencies to their latest versions for improved stability and performance.
@mrz1836
chore(deps): update indirect dependencies in go.mod and go.sum
9c18fcc
@sonarqubecloud
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sonarqubecloud bot commented Nov 4, 2025

Quality Gate Passed Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

@mrz1836 mrz1836 merged commit e2a129e into main Nov 4, 2025
45 checks passed
@github-actions github-actions bot deleted the feature/dht-mode-cleanup branch November 4, 2025 13:28
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@mrz1836 mrz1836 mrz1836 approved these changes

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chore Simple dependency updates or version bumps feature Any new significant addition refactor Any significant refactoring size/L Large change (201–500 lines) update General updates

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@icellan @galt-tr @mrz1836