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https://en.wikipedia.org/wiki/Bit_numbering#Least_significant_bit Signed-off-by: Catalin Patulea <catalinp@google.com>
16 lines
1.4 KiB
Markdown
16 lines
1.4 KiB
Markdown
# Chunks Disk Format
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The following describes the format of a single chunks file, which is created in the `chunks/` directory of a block. The maximum size per segment file is 512MiB.
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Chunks in the files are referenced from the index by uint64 composed of in-file offset (lower 4 bytes) and segment sequence number (upper 4 bytes).
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```
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┌────────────────────────────────────────┬──────────────────────┐
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│ magic(0x85BD40DD) <4 byte> │ version(1) <1 byte> │
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├────────────────────────────────────────┴──────────────────────┤
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│ ┌───────────────┬───────────────────┬──────┬────────────────┐ │
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│ │ len <uvarint> │ encoding <1 byte> │ data │ CRC32 <4 byte> │ │
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│ └───────────────┴───────────────────┴──────┴────────────────┘ │
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└───────────────────────────────────────────────────────────────┘
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```
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