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HostHandoffHandle

memra_server

Struct HostHandoffHandle 

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pub struct HostHandoffHandle { /* private fields */ }
Expand description

Host-tier deploy handoff (lane/host-tier-deploy-warmth-20260901): the engine half of a deployment admin POST /admin/kv-host/export / POST /admin/kv-host/import pair. Contract notes for the deployment surface: export is called ONLY on the drained old slot (it refuses under traffic unless force, and the write stalls that slot’s ticks for its duration, expected and harmless when drained); import answers as soon as the file header validates, then re-materializes entries one per tick in the background (watch prefix_host_handoff_* in /metrics for completion). Same lifetime contract as TrimHandle: drop it on the shutdown signal.

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impl HostHandoffHandle

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pub async fn export(&self, force: bool) -> Result<Value, String>

Errors as strings: worker down, refused, or no answer. The timeout is generous by design: tens of GB of drain-demote + NVMe write happen inside the reply.

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pub async fn import(&self) -> Result<Value, String>

Begin the drip import; answers with the validated header (fast: no entry bytes are read yet) or the refusal reason.

Trait Implementations§

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impl Clone for HostHandoffHandle

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fn clone(&self) -> HostHandoffHandle

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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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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