Struct scylla::routing::Sharder

source · [−]

pub struct Sharder {
    pub nr_shards: ShardCount,
    pub msb_ignore: u8,
}

Fields

nr_shards: ShardCountmsb_ignore: u8

Implementations

impl Sharder

pub fn new(nr_shards: ShardCount, msb_ignore: u8) -> Self

pub fn shard_of(&self, token: Token) -> Shard

pub fn shard_of_source_port(&self, source_port: u16) -> Shard

If we connect to Scylla using Scylla’s shard aware port, then Scylla assigns a shard to the connection based on the source port. This calculates the assigned shard.

pub fn draw_source_port_for_shard(&self, shard: Shard) -> u16

Randomly choose a source port p such that shard == shard_of_source_port(p).

pub fn iter_source_ports_for_shard(
&self,
shard: Shard
) -> impl Iterator<Item = u16>

Returns iterator over source ports p such that shard == shard_of_source_port(p). Starts at a random port and goes forward by nr_shards. After reaching maximum wraps back around. Stops once all possible ports have been returned

Trait Implementations

impl Clone for Sharder

fn clone(&self) -> Sharder

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Debug for Sharder

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

Formats the value using the given formatter. Read more

impl PartialEq<Sharder> for Sharder

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

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &Sharder) -> bool

This method tests for !=.

impl Eq for Sharder

impl StructuralEq for Sharder

impl StructuralPartialEq for Sharder

Auto Trait Implementations

impl RefUnwindSafe for Sharder

impl Send for Sharder

impl Sync for Sharder

impl Unpin for Sharder

impl UnwindSafe for Sharder

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

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

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more