Enum Preallocate 

pub enum Preallocate {
    Zero,
    ShortFirst,
    Size,
    None,
}

How new segment files are prepared.

Variants

Zero

Write zeros through the whole file and flush it, so later writes are overwrites and fdatasync has no metadata to persist.

ShortFirst

Zero-fill at most one MiB when opening a shard. Prepare full-size successor segments ahead of rollover.

Size

Only set the file length.

None

Grow the file as records are written.

Trait Implementations

impl Clone for Preallocate

fn clone(&self) -> Preallocate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Preallocate

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

Formats the value using the given formatter.

impl PartialEq for Preallocate

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

impl Eq for Preallocate

impl StructuralPartialEq for Preallocate