Struct LevelMetaData 

pub struct LevelMetaData { /* private fields */ }

The metadata that describes one level of a column family’s LSM tree.

Obtained from a ColumnFamilyMetaData query. The value is a snapshot taken when the metadata was collected and does not track later compactions or flushes.

Implementations

impl LevelMetaData

pub fn level(&self) -> i32

The level this metadata describes, for example 0 for L0.

Do not assume this equals the index the value was read at: the filtered GetColumnFamilyMetaData overload skips levels with no matching files, so indices are not level numbers.

pub fn size(&self) -> u64

Total size of the level in bytes, the sum of its files’ sizes.

pub fn file_count(&self) -> usize

Number of SST files in this level.

pub fn sst_file(&self, index: usize) -> Option<SstFileMetaData>

Metadata for the indexth SST file of this level, or None if index is out of range.

For level 0 the files are ordered most-recently-updated first; for level 1 and above they are ordered by increasing key range.

pub fn sst_files(&self) -> impl Iterator<Item = SstFileMetaData> + '_

Iterates the SST files of this level in order.

Trait Implementations

impl Debug for LevelMetaData

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for LevelMetaData

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl Send for LevelMetaData