Struct MemoryMappedStore 

pub struct MemoryMappedStore {
    pub enabled: bool,
    pub kind: MemoryMappedKind,
    pub path: Option<String>,
    pub read_only: bool,
    pub max_size_bytes: Option<u64>,
    pub max_groups: Option<u32>,
    pub prefix: Option<String>,
}

Memory-mapped store configuration.

Unlike the key-value, queue, and relational stores, the memory-mapped store works with binary keys and binary values. Each “group” maps to a named sub-database inside the LMDB environment so multiple logical tables can share one mmap.

Fields

enabled: bool

Whether the store is enabled.

kind: MemoryMappedKind

Backend implementation.

path: Option<String>

Filesystem path (LMDB only). For LMDB this is a directory path that will hold data.mdb and lock.mdb. Ignored for Memory and Sink.

read_only: bool

Open the store read-only. Required when multiple processes need to read the same LMDB environment concurrently.

max_size_bytes: Option<u64>

Upper bound on the mmap’d file size (LMDB only). LMDB requires the map size to be set up front; reads use it as virtual-address-space allocation, not as a disk allocation, so being generous is cheap. Defaults to 16 GiB if None.

max_groups: Option<u32>

Maximum number of named sub-databases (groups) inside one LMDB env. Defaults to 64.

prefix: Option<String>

Optional prefix prepended to all group names.

Trait Implementations

impl Clone for MemoryMappedStore

fn clone(&self) -> MemoryMappedStore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryMappedStore

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

Formats the value using the given formatter.

impl Default for MemoryMappedStore

fn default() -> MemoryMappedStore

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MemoryMappedStore

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MemoryMappedStore

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

where __S: Serializer,

Serialize this value into the given Serde serializer.