Struct ChunkState

Struct Documentation

struct ChunkState

The structure for representing chunk information and for forward iteration.

This struct is partially mapped to the Flat Buffer data. Flat Buffer Reference: fb/metadata.fbs :: ChunkOffset

Public Functions

ChunkState(uint64_t offset, ts_t start, ts_t end)

The current chunk’s offset from the begining of the chunks section.

Parameters:

  • offset[in] – the chunk position represented as an offset in bytes relative to the end of the file header.

  • start[in] – the earliest timestamp in a message within the chunk.

  • end[in] – the latest timestamp in a message within the chunk. Flat Buffer Reference: fb/metadata.fbs :: ChunkOffset :: offset

Public Members

uint64_t offset

The file offset of the chunk (in number of bytes.

uint64_t size

The size of this chunk in bytes.

uint64_t next_offset = {std::numeric_limits<uint64_t>::max()}

The next chunk’s offset for forward iteration.

Should work like a linked list.

This is partially synthesized from the Flat Buffers. This will link up with the next chunks offset. Value is set in ChunksPile::link_stream_chunks Flat Buffer Reference: fb/metadata.fbs :: ChunkOffset :: offset

ts_t start_ts

The first timestamp in the chunk in ordinality.

Flat Buffer Reference: fb/metadata.fbs :: ChunkOffset :: start_ts

ts_t end_ts

The last timestamp in the chunk in ordinality.

Flat Buffer Reference: fb/metadata.fbs :: ChunkOffset :: end_ts

ChunkValidity status = {ChunkValidity::UNKNOWN}

The validity of the current chunk.

This is synthesized and thus does not have a reference in the Flat Buffers. Value is set in Reader::verify_chunk