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VnodeRehydration

laminar_db::recovery_manager

Struct VnodeRehydration 

Source 
pub struct VnodeRehydration {
    pub epoch: Option<u64>,
    pub restored: HashMap<u32, Bytes>,
    pub missing: Vec<u32>,
    pub errors: HashMap<u32, String>,
}
Expand description

Outcome of rehydrating a set of vnodes from durable state.

Best-effort by construction: a per-vnode read failure is recorded in errors rather than aborting the others, so a single transient object-store hiccup can’t strand an entire rebalance.

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§epoch: Option<u64>

Committed epoch the partials were read from. None when the backend reported no committed epoch (every requested vnode is treated as a fresh start).

§restored: HashMap<u32, Bytes>

vnode → restored partial bytes, for vnodes that had durable state at epoch.

§missing: Vec<u32>

Requested vnodes with no durable partial — never written, or pruned below the committed epoch. These resume from empty state.

§errors: HashMap<u32, String>

vnode → error message for reads that failed.

Implementations§

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impl VnodeRehydration

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pub fn restored_count(&self) -> usize

Number of vnodes whose state was successfully read back.

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pub fn has_errors(&self) -> bool

Whether any per-vnode read failed.

Trait Implementations§

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impl Debug for VnodeRehydration

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

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

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fn default() -> VnodeRehydration

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

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