Method Flush

tempodb/encoding/vparquet4/wal_block.go:419–465

()

}

func (b *walBlock) Flush() (err error) {
	if b.ids.Len() == 0 {
		return nil
	}

	b.buffer = nil

	// Flush latest meta first
	// This mainly contains the slack-adjusted start/end times
	metaBytes, err := json.Marshal(b.BlockMeta())
	if err != nil {
		return fmt.Errorf("error marshaling meta json: %w", err)
	}

	metaPath := filepath.Join(b.walPath(), backend.MetaName)
	err = os.WriteFile(metaPath, metaBytes, 0o600)
	if err != nil {
		return fmt.Errorf("error writing meta json: %w", err)
	}

	// Now flush/close current writer
	err = b.writer.Close()
	if err != nil {
		return fmt.Errorf("error closing writer: %w", err)
	}

	info, err := b.file.Stat()
	if err != nil {
		return fmt.Errorf("error getting info: %w", err)
	}
	sz := info.Size()

	err = b.file.Close()
	if err != nil {
		return fmt.Errorf("error closing file: %w", err)
	}

	b.writeFlush(newWalBlockFlush(b.file.Name(), b.ids))
	b.mtx.Lock()
	b.flushedSize += sz
	b.unflushedSize = 0
	b.mtx.Unlock()
	b.ids = common.NewIDMap[int64](b.ids.Len()) // Recreate new id map with same expected size

	// Open next one
	return b.openWriter()
}

// DataLength returns estimated size of WAL files on disk. Used for
// cutting WAL files by max size.