mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 06:04:05 -08:00
32 lines
2.1 KiB
Markdown
32 lines
2.1 KiB
Markdown
# Chunks Disk Format
|
|
|
|
The following describes the format of a chunks file,
|
|
which is created in the `chunks/` directory of a block.
|
|
The maximum size per segment file is 512MiB.
|
|
|
|
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).
|
|
|
|
```
|
|
┌────────────────────────────┬─────────────────────┐
|
|
│ magic(0x85BD40DD) <4 byte> │ version(1) <1 byte> │
|
|
├────────────────────────────┴─────────────────────┤
|
|
│ ┌──────────────────────────────────────────────┐ │
|
|
│ │ Chunk 1 │ │
|
|
│ ├──────────────────────────────────────────────┤ │
|
|
│ │ ... │ │
|
|
│ ├──────────────────────────────────────────────┤ │
|
|
│ │ Chunk N │ │
|
|
│ └──────────────────────────────────────────────┘ │
|
|
└──────────────────────────────────────────────────┘
|
|
```
|
|
|
|
|
|
# Chunk
|
|
|
|
```
|
|
┌───────────────┬───────────────────┬──────────────┬────────────────┐
|
|
│ len <uvarint> │ encoding <1 byte> │ data <bytes> │ CRC32 <4 byte> │
|
|
└───────────────┴───────────────────┴──────────────┴────────────────┘
|
|
```
|