Phase 42.4 Show & Tell — CheckpointManager: Distributed Snapshots & Recovery

[web3guru888]

CheckpointManager — Show & Tell

Share your implementations and benchmarks for distributed checkpointing and recovery.

Topics for Discussion

• Chandy-Lamport Algorithm: Marker-based consistent cut implementation
• Write-Ahead Logging: WAL design, segment management, compaction
• Incremental Checkpointing: Delta-based approach, hash-based change detection
• Compression: LZ4 vs Zstd for model state compression benchmarks
• Activation Checkpointing: Memory savings vs recomputation cost trade-offs
• Recovery Performance: Rollback + WAL replay benchmarks

Key Metrics to Share

• Checkpoint creation time (ms)
• Checkpoint size (MB) — full vs incremental
• Compression ratio by algorithm
• Recovery time (checkpoint load + WAL replay)
• Training overhead from checkpointing (%)
• Activation checkpoint memory savings (%)

Reference issue: #844 | Planning: #840