Struct CompactionFile

Source

pub struct CompactionFile {
    pub id: u64,
    pub level: u32,
    pub size: u64,
    pub smallest_key: Vec<u8>,
    pub largest_key: Vec<u8>,
    pub num_entries: u64,
    pub num_deletions: u64,
    pub num_old_versions: u64,
    pub oldest_timestamp: Timestamp,
    pub newest_timestamp: Timestamp,
    pub created_at: Instant,
}

Expand description

File metadata for compaction decisions

Fields§

§id: u64

File ID

§level: u32

Level (0 = memtable flush, 1+ = compacted levels)

§size: u64

File size in bytes

§smallest_key: Vec<u8>

Smallest key

§largest_key: Vec<u8>

Largest key

§num_entries: u64

Number of entries

§num_deletions: u64

Number of deletions (tombstones)

§num_old_versions: u64

Number of old versions (non-latest)

§oldest_timestamp: Timestamp

Oldest entry timestamp

§newest_timestamp: Timestamp

Newest entry timestamp

§created_at: Instant

Creation time

Implementations§

Source §

impl CompactionFile

Source

pub fn tombstone_density(&self) -> f64

Calculate tombstone density

Source

pub fn version_density(&self) -> f64

Calculate version density (ratio of old versions)

Source

pub fn garbage_ratio(&self) -> f64

Calculate garbage ratio (tombstones + old versions)

Source

pub fn overlaps(&self, smallest: &[u8], largest: &[u8]) -> bool

Check if file overlaps with key range

Trait Implementations§

Source §

impl Clone for CompactionFile

Source §

fn clone(&self) -> CompactionFile

Returns a duplicate of the value. Read more

1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Source §

impl Debug for CompactionFile

Source §

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl UnwindSafe for CompactionFile

Blanket Implementations§

Source §

impl<T> Any for T
where T: 'static + ?Sized,

Source §

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

Source §

impl<T> Borrow<T> for T
where T: ?Sized,

Source §

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

Source §

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source §

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

Source §

impl<T> CloneToUninit for T
where T: Clone,

Source §

unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

Source §

impl<T> From<T> for T

Source §

fn from(t: T) -> T

Returns the argument unchanged.

Source §

impl<T> Instrument for T

Source §

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Source §

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

impl<T, U> Into for T
where U: From<T>,

Source §

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source §

impl<T> IntoEither for T

Source §

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

Source §

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

Source §