Struct PerHostEnvelope 

pub struct PerHostEnvelope {
    pub bin: String,
    pub ld_library_path: String,
    pub cwd_subpath: String,
}

Per-host pre-flight build artifact descriptor — exactly what the launcher needs to substitute the remote dispatch with a direct binary exec. Mirrors flodl::distributed::launcher::PerHostPrebuild on the consumer side; the two structs share an on-the-wire JSON schema but are independent types because the crates can’t share declarations without a circular dep.

Fields

bin: String

Path to the compiled binary, relative to the host’s project checkout (worker.path). e.g. target/cluster/node-b/precompiled-cu128/release/train.

ld_library_path: String

Absolute path the launcher should set as LD_LIBRARY_PATH so the binary finds its libtorch at runtime. e.g. /home/me/rdl/libtorch/builds/sm61-sm120/lib. The launcher may append host-specific extras (e.g. :/usr/local/lib for bare- metal libnccl) via worker.env: { LD_LIBRARY_PATH: ... }.

cwd_subpath: String

Subdirectory under the host’s project checkout to cd into before exec — the relative offset of the command’s filesystem cwd from project_root. Mirrors the cwd the controller-side build used (e.g. ddp-bench for fdl ddp-bench). Empty string means execute from worker.path directly. Relative-path defaults the binary expects (e.g. --data-dir data, --output runs/) only resolve correctly when the remote cwd matches.

Trait Implementations

impl Clone for PerHostEnvelope

fn clone(&self) -> PerHostEnvelope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PerHostEnvelope

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PerHostEnvelope

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PerHostEnvelope

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.