Enum StorageTier 

#[non_exhaustive]
pub enum StorageTier {
    InMemory,
    OnDisk,
    Uninitialized,
}

The current storage tier of a data structure.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

InMemory

Fully in RAM. Fastest access for both reads and writes.

OnDisk

On disk, accessed via mmap. The OS page cache provides warm reads. Mutations go through a WAL overlay.

Uninitialized

Not yet initialized (structure exists but has no data).

Implementations

impl StorageTier

pub fn is_in_memory(self) -> bool

Returns true if data is fully in RAM.

pub fn is_on_disk(self) -> bool

Returns true if data is served from disk (mmap).

Trait Implementations

impl Clone for StorageTier

fn clone(&self) -> StorageTier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StorageTier

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

Formats the value using the given formatter.

impl Hash for StorageTier

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 StorageTier

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for StorageTier

impl Eq for StorageTier

impl StructuralPartialEq for StorageTier