Enum CompressionAlgorithm 

pub enum CompressionAlgorithm {
    None,
    Lz4,
    Snappy,
    Deflate,
    Zstd,
}

Compression algorithms supported

Variants

None

No compression

Lz4

LZ4 compression (fast)

Snappy

Snappy compression (balanced)

Deflate

Deflate compression (high ratio)

Zstd

Zstd compression (high efficiency)

Implementations

impl CompressionAlgorithm

pub fn parse(s: &str) -> Result<Self>

Fallible parse of a compressor name (issue #1001).

This is the path the SSTable open / CompressionInfo.db flow MUST use: an unrecognized name produces an explicit UnsupportedFormat error (including the exact offending string) rather than silently falling back to uncompressed. No content-based guessing is performed (no-heuristics mandate, issue #28).

Trait Implementations

impl Clone for CompressionAlgorithm

fn clone(&self) -> CompressionAlgorithm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CompressionAlgorithm

impl Debug for CompressionAlgorithm

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

Formats the value using the given formatter.

impl Default for CompressionAlgorithm

fn default() -> CompressionAlgorithm

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CompressionAlgorithm

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<&str> for CompressionAlgorithm

fn from(s: &str) -> Self

Infallible best-effort mapping. Unrecognized names map to None.

WARNING: this MUST NOT be used on the SSTable read path — an unknown name here is indistinguishable from genuinely-disabled compression. Use the fallible CompressionAlgorithm::parse for any path that opens real CompressionInfo.db metadata (issue #1001). This From is retained only for the legacy header (SSTableHeader.compression.algorithm) path, which guards with an explicit != "NONE" check before conversion and re-validates the resulting variant.

impl From<String> for CompressionAlgorithm

fn from(s: String) -> Self

Converts to this type from the input type.

impl PartialEq for CompressionAlgorithm

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for CompressionAlgorithm

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CompressionAlgorithm