Struct Limits 

pub struct Limits {
    pub max_listpack_entries: usize,
    pub max_listpack_value: usize,
}

Where the encoding changes over.

These are hash-max-listpack-entries and hash-max-listpack-value, runtime configuration in Redis, so they are passed in rather than being constants. The value limit applies to a field name and to a value alike, which is what hashTypeTryConversion does.

Fields

max_listpack_entries: usize

At this many fields a hash stops being a listpack.

max_listpack_value: usize

A field or a value longer than this cannot go in a listpack.

Implementations

impl Limits

pub const DEFAULT: Limits

Redis’s defaults: 512 and 64.

The count is 512 and not the 128 everyone remembers, and everyone remembers 128 because that is what it was for years. Read off a running 8.10.1 with nothing in its config file rather than off the documentation, which is the only way to be sure of a number like this. It matters because a hash of two hundred fields answers listpack there, so it has to answer listpack here too.

Trait Implementations

impl Clone for Limits

fn clone(&self) -> Limits

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Limits

impl Debug for Limits

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

Formats the value using the given formatter.

impl Default for Limits

fn default() -> Limits

Returns the “default value” for a type.

impl Eq for Limits

impl PartialEq for Limits

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Limits