Struct DaemonConfig 

pub struct DaemonConfig {

    pub shm_prefixes: Vec<String>,
    pub tcp_addrs: Vec<String>,
    pub http_addrs: Vec<String>,
    pub shm_depth: usize,
    pub wait_strategy: MyelonWaitStrategy,
    pub tcp_tpc_threads: usize,
    pub tcp_dispatch_workers: usize,
    pub http_tpc_threads: usize,
    pub http_dispatch_workers: usize,
    pub puffer_dir: PathBuf,
    pub puffer_ram_bytes: Option<u64>,
    pub puffer_disk_bytes: Option<u64>,
    pub puffer_block_size_bytes: Option<u64>,
    pub s3_prefix: String,
    pub slatedb_path: PathBuf,
    pub namespace: String,
    pub namespace_max_bytes: Option<u64>,
    pub eviction_interval: Duration,
    pub quiet_banner: bool,
    pub trace_daemon: bool,
    pub prefetch_dry_run: bool,
}

All the daemon-binary’s WMBT_KV_* knobs in one place.

Field rustdoc IS the operator documentation, keep it accurate.

Fields

shm_prefixes: Vec<String>

SHM prefixes to serve. From WMBT_KV_DAEMON_SHM_PREFIX (single value); CLI --prefix flags additively extend the list. If empty after CLI + env, the daemon falls back to ["default"] when no TCP/HTTP listeners are configured.

tcp_addrs: Vec<String>

TCP listener addresses. From WMBT_KV_TCP (comma-separated host:port list); CLI --tcp <addr> flags extend.

http_addrs: Vec<String>

HTTP listener addresses. From WMBT_KV_HTTP; CLI --http extends.

shm_depth: usize

SHM ring depth. From WMBT_KV_DAEMON_SHM_DEPTH. Default 16.

wait_strategy: MyelonWaitStrategy

SHM consumer wait strategy. From WMBT_KV_DAEMON_SHM_WAIT_STRATEGY (block / busyspin). Default Block (signal-driven park): ~µs wake latency, 0% idle CPU. BusySpin keeps the consumer thread spinning at 100% CPU for ultra-low-latency RPC scenarios where the wake-µs matters and CPU is free.

tcp_tpc_threads: usize

Per-shard compio TPC threads for the TCP listener. From WMBT_KV_TCP_TPC_THREADS. Default 2 (SO_REUSEPORT-balanced accept across 2 compio threads). Bump for >16 concurrent clients.

tcp_dispatch_workers: usize

Sync dispatch worker pool size behind the TCP compio bridge. From WMBT_KV_TCP_DISPATCH_WORKERS. Default 8.

http_tpc_threads: usize

Per-shard compio TPC threads for the HTTP listener. From WMBT_KV_HTTP_TPC_THREADS. Default 2.

http_dispatch_workers: usize

Sync dispatch worker pool size behind the HTTP compio bridge. From WMBT_KV_HTTP_DISPATCH_WORKERS. Default 8.

puffer_dir: PathBuf

Foyer SSD-tier directory. From WMBT_KV_PUFFER_DIR. Default ~/.wombatkv/puffer (matches wombatkv-cabi’s default; survives reboot, no LAN-port collisions across runs); falls back to /tmp/wombatkv-puffer-shm-foyer with a warning if $HOME is unset or mkdir -p fails (e.g. daemon launched as a system service without a home dir). Also the default parent for SlateDB if WMBT_KV_SLATEDB_PATH is unset.

puffer_ram_bytes: Option<u64>

Foyer RAM-tier byte budget. From WMBT_KV_PUFFER_RAM_BYTES. None means use FoyerCacheConfig’s default.

puffer_disk_bytes: Option<u64>

Foyer SSD-tier byte budget. From WMBT_KV_PUFFER_DISK_BYTES.

puffer_block_size_bytes: Option<u64>

Foyer-internal block size. From WMBT_KV_PUFFER_BLOCK_SIZE_BYTES.

s3_prefix: String

S3 object-key prefix for daemon-served blocks. From WMBT_KV_S3_PREFIX. Default kv/puffer-shm.

slatedb_path: PathBuf

SlateDB L1 metadata-index on-disk root. From WMBT_KV_SLATEDB_PATH. Defaults to <puffer_dir>/slatedb.

namespace: String

Logical namespace tag (multi-tenant scope). From WMBT_KV_NAMESPACE. Default default.

namespace_max_bytes: Option<u64>

Per-namespace LRU eviction cap (bytes). From WMBT_KV_NAMESPACE_MAX_BYTES. None means eviction disabled (no cap). Production deployments should set this, without it, the bucket grows forever.

eviction_interval: Duration

Eviction worker poll interval. From WMBT_KV_EVICTION_INTERVAL_SECS. Default 30s.

quiet_banner: bool

Suppress the 0.1.0-alpha banner. From WMBT_KV_QUIET_BANNER.

trace_daemon: bool

Trace daemon SHM I/O to stderr. From WMBT_KV_DAEMON_SHM_TRACE_DAEMON.

prefetch_dry_run: bool

Prefetch worker logs candidates without materializing. From WMBT_KV_PREFETCH_DRY_RUN. Useful for tuning WMBT_KV_PREFETCH_TOP_K against a workload without paying the actual GET cost.

Implementations

impl DaemonConfig

pub fn from_env() -> Self

Resolve from env. Reads every WMBT_KV_* var the daemon binary consumes, applies defaults, and returns a fully- populated config. CLI args are merged separately by bin/wombatkv-daemon.rs (which calls this and then layers CLI overrides on top).

Trait Implementations

impl Clone for DaemonConfig

fn clone(&self) -> DaemonConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DaemonConfig

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

Formats the value using the given formatter.

impl Default for DaemonConfig

fn default() -> Self

Returns the “default value” for a type.