Enum TierOverride 

#[non_exhaustive]
pub enum TierOverride {
    Auto,
    ForceRam,
    ForceDisk,
}

Controls whether a section stays in RAM, on disk, or is auto-managed.

The default (Auto) lets the BufferManager decide based on memory pressure. Power users can pin a section to a specific tier for predictable performance.

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.

Auto

Memory-first, spill to disk when budget exceeded (default).

ForceRam

Always keep in RAM. Fail with error if insufficient memory.

ForceDisk

Always use disk (mmap). Minimal RAM footprint.

Trait Implementations

impl Clone for TierOverride

fn clone(&self) -> TierOverride

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TierOverride

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

Formats the value using the given formatter.

impl Default for TierOverride

fn default() -> TierOverride

Returns the “default value” for a type.

impl PartialEq for TierOverride

fn eq(&self, other: &TierOverride) -> 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 TierOverride

impl Eq for TierOverride

impl StructuralPartialEq for TierOverride