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← 2026-04-03 10:00-12:00\nchunks/ ← compressed time-series data\n000001 ← chunk file (multiple series)\n000002\nindex ← series_id → chunk offset\nmeta.json ← block metadata (time range, stats)\nblock_2026040312/ ← 2026-04-03 12:00-14:00\nchunks/\nindex\nmeta.json\nwal/ ← write-ahead log (in-memory block)\n00000001\n00000002","originalText":"/data/\nblock_2026040310/ ← 2026-04-03 10:00-12:00\nchunks/ ← compressed time-series data\n000001 ← chunk file (multiple series)\n000002\nindex ← series_id → chunk offset\nmeta.json ← block metadata (time range, stats)\nblock_2026040312/ ← 2026-04-03 12:00-14:00\nchunks/\nindex\nmeta.json\nwal/ ← write-ahead log (in-memory 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