Enum StorageStatus 

#[non_exhaustive]
pub enum StorageStatus {
    Healthy,
    FullCompactionAvailable,
    TightCompactionAvailable,
    ReadOnlyOutOfSpace,
    CompactionInProgress,
}

Coarse storage state of a tree.

With storage admission gating off (no configured quota and a backend that cannot report free space) a tree reports Self::Healthy or, mid-run, Self::CompactionInProgress. Once gating is active (bounded capacity), an idle tree instead reports compaction availability: Self::FullCompactionAvailable when a full compaction has working room, Self::TightCompactionAvailable when only the opt-in tight-space mode would fit, and Self::ReadOnlyOutOfSpace when the write gate is closed (this takes precedence over a concurrent compaction).

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.

Healthy

Normal operation: writes and a full compaction are available.

FullCompactionAvailable

Enough free space for a normal (full) compaction.

TightCompactionAvailable

Not enough space for a full compaction, but the opt-in tight-space (incremental-reclaim) compaction mode can still run.

ReadOnlyOutOfSpace

Out of space: the tree is read-only until space is freed or the quota is raised.

CompactionInProgress

A compaction is currently running.

Trait Implementations

impl Clone for StorageStatus

fn clone(&self) -> StorageStatus

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for StorageStatus

impl Debug for StorageStatus

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

Formats the value using the given formatter.

impl Eq for StorageStatus

impl Hash for StorageStatus

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 StorageStatus

fn eq(&self, other: &StorageStatus) -> 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 StructuralPartialEq for StorageStatus