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ReadFanoutPolicy

reddb::cluster

Enum ReadFanoutPolicy 

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pub enum ReadFanoutPolicy {
    SingleOwnerOnly,
    ExplicitFanout {
        budget: ReadFanoutBudget,
        allow_partial: bool,
    },
}
Expand description

The explicit policy a caller supplies before a read may fan out.

The default posture is SingleOwnerOnly: a read that would cross owners is rejected before execution. To scatter, a caller must choose ExplicitFanout and provide a ReadFanoutBudget. That is the ADR 0055 contract in code: no hidden, unbounded fanout path for cold-cache or missing-shard-key query shapes.

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SingleOwnerOnly

Only reads that resolve to one owner are admitted.

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ExplicitFanout

Cross-owner fanout is allowed, bounded, and marked with partial-result policy for the executor/transport.

Fields

§budget: ReadFanoutBudget
§allow_partial: bool

Implementations§

Trait Implementations§

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impl Clone for ReadFanoutPolicy

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fn clone(&self) -> ReadFanoutPolicy

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for ReadFanoutPolicy

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impl Debug for ReadFanoutPolicy

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

Formats the value using the given formatter. Read more
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impl Default for ReadFanoutPolicy

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fn default() -> ReadFanoutPolicy

Returns the “default value” for a type. Read more
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impl Eq for ReadFanoutPolicy

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impl PartialEq for ReadFanoutPolicy

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for ReadFanoutPolicy

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