Enum CacheTier 

pub enum CacheTier {
    Resident,
    Local,
    Absent,
}

The tier that would serve a read of an entry, as CacheBackend::peek_tier predicts it.

Variants

Resident

In RAM: a read is a memory hit.

Local

Not in RAM but held by a local tier below it, such as a persistent store or a buffer of recently evicted entries: a read costs local I/O at most, never the caller’s loader.

Absent

Held by no tier: a read runs the caller’s loader.

Trait Implementations

impl Clone for CacheTier

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CacheTier

impl Debug for CacheTier

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

Formats the value using the given formatter.

impl Eq for CacheTier

impl Hash for CacheTier

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for CacheTier

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CacheTier