EnvironmentKind

reth_db::mdbx

Enum EnvironmentKind 

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pub enum EnvironmentKind {
    Default,
    WriteMap,
}
Available on crate feature mdbx only.
Expand description

Determines how data is mapped into memory

It only takes effect when the environment is opened.

Variants§

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Default

Open the environment in default mode, without WRITEMAP.

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WriteMap

Open the environment as mdbx-WRITEMAP. Use a writeable memory map unless the environment is opened as MDBX_RDONLY (crate::Mode::ReadOnly).

All data will be mapped into memory in the read-write mode crate::Mode::ReadWrite. This offers a significant performance benefit, since the data will be modified directly in mapped memory and then flushed to disk by single system call, without any memory management nor copying.

This mode is incompatible with nested transactions.

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impl EnvironmentKind

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pub const fn is_write_map(&self) -> bool

Returns true if the environment was opened as WRITEMAP.

Trait Implementations§

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impl Clone for EnvironmentKind

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fn clone(&self) -> EnvironmentKind

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for EnvironmentKind

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

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

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fn default() -> EnvironmentKind

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

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fn eq(&self, other: &EnvironmentKind) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for EnvironmentKind

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impl Eq for EnvironmentKind

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impl StructuralPartialEq for EnvironmentKind

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impl<T> Any for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)
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Compare self to key and return true if they are equal.
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Causes self to use its Binary implementation when Debug-formatted.
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where Self: LowerExp,

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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

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where Self: UpperExp,

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where Self: UpperHex,

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Wrap the input message T in a tonic::Request
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const ALIGN: usize

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type Init = T

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fn propagate_header(self, header: HeaderName) -> PropagateHeader<Self>
where Self: Sized,

Propagate a header from the request to the response. Read more
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fn add_extension<T>(self, value: T) -> AddExtension<Self, T>
where Self: Sized,

Add some shareable value to request extensions. Read more
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fn map_request_body<F>(self, f: F) -> MapRequestBody<Self, F>
where Self: Sized,

Apply a transformation to the request body. Read more
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fn map_response_body<F>(self, f: F) -> MapResponseBody<Self, F>
where Self: Sized,

Apply a transformation to the response body. Read more
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fn compression(self) -> Compression<Self>
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Compresses response bodies. Read more
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Follow redirect resposes using the Standard policy. Read more
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fn sensitive_headers( self, headers: impl IntoIterator<Item = HeaderName>, ) -> SetSensitiveRequestHeaders<SetSensitiveResponseHeaders<Self>>
where Self: Sized,

Mark headers as sensitive on both requests and responses. Read more
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fn sensitive_request_headers( self, headers: impl IntoIterator<Item = HeaderName>, ) -> SetSensitiveRequestHeaders<Self>
where Self: Sized,

Mark headers as sensitive on requests. Read more
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fn sensitive_response_headers( self, headers: impl IntoIterator<Item = HeaderName>, ) -> SetSensitiveResponseHeaders<Self>
where Self: Sized,

Mark headers as sensitive on responses. Read more
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fn override_request_header<M>( self, header_name: HeaderName, make: M, ) -> SetRequestHeader<Self, M>
where Self: Sized,

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where Self: Sized,

Append a header into the request. Read more
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where Self: Sized,

Insert a header into the request, if the header is not already present. Read more
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fn override_response_header<M>( self, header_name: HeaderName, make: M, ) -> SetResponseHeader<Self, M>
where Self: Sized,

Insert a header into the response. Read more
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fn append_response_header<M>( self, header_name: HeaderName, make: M, ) -> SetResponseHeader<Self, M>
where Self: Sized,

Append a header into the response. Read more
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fn insert_response_header_if_not_present<M>( self, header_name: HeaderName, make: M, ) -> SetResponseHeader<Self, M>
where Self: Sized,

Insert a header into the response, if the header is not already present. Read more
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fn set_request_id<M>( self, header_name: HeaderName, make_request_id: M, ) -> SetRequestId<Self, M>
where Self: Sized, M: MakeRequestId,

Add request id header and extension. Read more
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fn set_x_request_id<M>(self, make_request_id: M) -> SetRequestId<Self, M>
where Self: Sized, M: MakeRequestId,

Add request id header and extension, using x-request-id as the header name. Read more
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fn propagate_request_id( self, header_name: HeaderName, ) -> PropagateRequestId<Self>
where Self: Sized,

Propgate request ids from requests to responses. Read more
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fn propagate_x_request_id(self) -> PropagateRequestId<Self>
where Self: Sized,

Propgate request ids from requests to responses, using x-request-id as the header name. Read more
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Catch panics and convert them into 500 Internal Server responses. Read more
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fn request_body_limit(self, limit: usize) -> RequestBodyLimit<Self>
where Self: Sized,

Intercept requests with over-sized payloads and convert them into 413 Payload Too Large responses. Read more
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where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

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Uses borrowed data to replace owned data, usually by cloning. Read more
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type Error = Infallible

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fn vzip(self) -> V

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Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte

Size for each variant:

  • Default: 0 bytes
  • WriteMap: 0 bytes