Struct network::throttling::Service

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pub struct Service { /* private fields */ }
Expand description

Throttling service is used to control the egress bandwidth, so as to avoid too much egress data cached in buffer.

The throttling is achieved by monitoring the message send queue size of all TCP sockets. Basically, the throttling is used in 2 ways:

  1. When the queue size reached the configured threshold, the synchronization layer will reduce the number of peers to broadcast messages, e.g. new block hashes, transaction digests.

  2. On the other hand, synchronization layer will also refuse to respond any size sensitive message, e.g. blocks.

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impl Service

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pub fn initialize( &mut self, cap_mb: usize, min_throttle_mb: usize, max_throttle_mb: usize )

Initialize the throttling service.

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pub fn check_throttling(&self) -> Result<(), Error>

Validate the throttling queue size for any data size sensitive operations. If the queue size exceeds the max_throttle_queue_size, return error with concrete reason.

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pub fn get_throttling_ratio(&self) -> f64

Get the throttling ratio according to the current queue size.

If the queue size is smaller than min_throttle_queue_size, return 1.0 as throttling ratio. Then, it allows to broadcast messages to all peers.

If the queue size is larger than max_throttle_queue_size, return 0 as throttling ratio. Then, it allows to broadcast messages to configured minimum peers.

Otherwise, the throttling works in manner of linear ratio (0, 1), in which case it allows to broadcast messages to partial peers.

Trait Implementations§

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impl Clone for Service

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fn clone(&self) -> Service

Returns a copy 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 Service

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for Service

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Serialize for Service

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

Serialize this value into the given Serde serializer. Read more

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