pub struct BlockBuilder {
buf: BytesMut,
compress_buf: BytesMut,
restart_count: usize,
restart_points: Vec<u32>,
last_key: Vec<u8>,
entry_count: usize,
compression_algorithm: CompressionAlgorithm,
table_id: Option<u32>,
restart_points_type_index: Vec<RestartPoint>,
}
Expand description
BlockBuilder
encodes and appends block to a buffer.
Fields§
§buf: BytesMut
Write buffer.
compress_buf: BytesMut
Compress buffer
restart_count: usize
Entry interval between restart points.
restart_points: Vec<u32>
Restart points.
last_key: Vec<u8>
Last key.
entry_count: usize
Count of entries in current block.
compression_algorithm: CompressionAlgorithm
Compression algorithm.
table_id: Option<u32>
§restart_points_type_index: Vec<RestartPoint>
Implementations§
source§impl BlockBuilder
impl BlockBuilder
pub fn new(options: BlockBuilderOptions) -> Self
pub fn add_for_test(&mut self, full_key: FullKey<&[u8]>, value: &[u8])
pub fn get_last_key(&self) -> &[u8] ⓘ
pub fn is_empty(&self) -> bool
pub fn clear(&mut self)
sourcepub fn uncompressed_block_size(&mut self) -> usize
pub fn uncompressed_block_size(&mut self) -> usize
Calculate block size without compression.
sourcepub fn build(&mut self) -> &[u8] ⓘ
pub fn build(&mut self) -> &[u8] ⓘ
Finishes building block.
§Format
compressed: | entries | restart point 0 (4B) | ... | restart point N-1 (4B) | N (4B) | restart point index 0 (5B)| ... | restart point index N-1 (5B) | N (4B) | table id (4B)
uncompressed: | compression method (1B) | xxhash64 checksum (8B) |
§Panics
Panic if there is compression error.
pub fn compress_block( buf: Bytes, target_compression: CompressionAlgorithm, ) -> HummockResult<Bytes>
pub fn compress( buf: &[u8], compression_algorithm: CompressionAlgorithm, compress_writer: BytesMut, ) -> BytesMut
sourcepub fn approximate_len(&self) -> usize
pub fn approximate_len(&self) -> usize
Approximate block len (uncompressed).
pub fn debug_valid(&self)
pub fn table_id(&self) -> Option<u32>
fn buf_reserve_size(option: &BlockBuilderOptions) -> usize
Auto Trait Implementations§
impl Freeze for BlockBuilder
impl RefUnwindSafe for BlockBuilder
impl Send for BlockBuilder
impl Sync for BlockBuilder
impl Unpin for BlockBuilder
impl UnwindSafe for BlockBuilder
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