Struct asuran::chunker::FastCDC

pub struct FastCDC {
    pub min_size: usize,
    pub max_size: usize,
    pub avg_size: usize,
}

Settings for a fastcdc Chunker

These are limited to usize, and not u64, because this implementation makes extensive use of in memory buffers of size max_size

This chunker, unlike BuzHash does not support any attempted mitigation of chunk based fingerprinting attacks. Those who are concerned about such an attack may wish to use the BuzHash chunker until such a time that a better repository format that does not leak information about chunk sizes can be developed.

Fields

min_size: usize

max_size: usize

avg_size: usize

Trait Implementations

impl Chunker for FastCDC

type Chunks = FastCDCChunker

The return type of the functions in this trait is an iterator over the chunks of their input.

pub fn chunk_boxed(
    &self,
    read: Box<dyn Read + Send + 'static, Global>
) -> <FastCDC as Chunker>::Chunks

Core function, takes a boxed owned Read and produces an iterator of Vec over it

fn chunk<R>(&self, read: R) -> Self::Chunks where
    R: 'static + Read + Send, 

Convenience function that boxes a bare Read for you, and passes it to chunk_boxed

fn chunk_slice<R>(&self, slice: R) -> Self::Chunks where
    R: 'static + AsRef<[u8]> + Send, 

Convenience function that boxes an AsRef<u8> wrapped in a cursor and passes it to chunk_boxed. Implementations are encouraged to overwrite when sensible.

impl Clone for FastCDC

pub fn clone(&self) -> FastCDC

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for FastCDC

pub fn default() -> FastCDC

Returns the “default value” for a type.

impl Copy for FastCDC