Enum SortPlan 

pub enum SortPlan {
    InMemory,
    External {
        run_buffer_bytes: usize,
        max_fan_in: u32,
    },
}

How a sort will be executed, chosen by crate::SortPlanner.

Variants

InMemory

Sort entirely in memory — a Vec sort that never opens a file descriptor. Chosen for small sorts when the budget has headroom.

External

Spill to disk and merge. run_buffer_bytes bounds the in-memory run before each spill; max_fan_in bounds the number of run files open at once during the (possibly cascaded) merge, so the process file descriptor table can never be exhausted.

Fields

run_buffer_bytes: usize

In-memory run size before a spill, in bytes.

max_fan_in: u32

Maximum run files open simultaneously during the merge.

Implementations

impl SortPlan

pub fn is_external(&self) -> bool

Whether this plan spills to disk.

pub fn is_in_memory(&self) -> bool

Whether this plan stays entirely in memory.

Trait Implementations

impl Clone for SortPlan

fn clone(&self) -> SortPlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SortPlan

impl Debug for SortPlan

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

Formats the value using the given formatter.

impl Eq for SortPlan

impl PartialEq for SortPlan

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SortPlan