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tsdb/docs: fix head chunks directory + link from README (#7309) 

Signed-off-by: Simon Pasquier <spasquie@redhat.com>
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Simon Pasquier 2020-06-17 17:08:21 +02:00 committed by GitHub
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1
tsdb/docs/format/README.md
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@ -2,5 +2,6 @@
* [Index](index.md)
* [Chunks](chunks.md)
* [Head Chunks](head_chunks.md)
* [Tombstones](tombstones.md)
* [Wal](wal.md)

11
tsdb/docs/format/head_chunks.md
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@ -1,7 +1,7 @@
# Head Chunks on Disk Format
The following describes the format of a chunks file,
which is created in the `wal/chunks/` inside the data directory.
The following describes the format of a chunks file, which is created in the
`chunks_head/` directory inside the data directory.
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).
@ -27,10 +27,13 @@ in-file offset (lower 4 bytes) and segment sequence number (upper 4 bytes).
# Chunk
Unlike chunks in the on-disk blocks, here we additionally store series reference that the chunks belongs to and the mint/maxt of the chunks. This is because we don't have an index associated with these chunks, hence these meta information are used while replaying the chunks.
Unlike chunks in the on-disk blocks, here we additionally store series
reference that the chunks belongs to and the mint/maxt of the chunks. This is
because we don't have an index associated with these chunks, hence these meta
information are used while replaying the chunks.
```
┌─────────────────────┬───────────────────────┬───────────────────────┬───────────────────┬───────────────┬──────────────┬────────────────┐
| series ref <8 byte> | mint <8 byte, uint64> | maxt <8 byte, uint64> | encoding <1 byte> | len <uvarint> | data <bytes> │ CRC32 <4 byte> │
└─────────────────────┴───────────────────────┴───────────────────────┴───────────────────┴───────────────┴──────────────┴────────────────┘
```
```