Struct DiskCache 

pub struct DiskCache {
    pub path: PathBuf,
    pub capacity: CacheCapacity,
    pub compression: bool,
    pub shards: usize,
}

Disk cache configuration for hybrid caching

When enabled, creates a two-tier cache:

• Hot articles in memory (fast, limited capacity)
• Cold articles on disk (slower, larger capacity)

Requires the hybrid-cache feature to be enabled.

Fields

path: PathBuf

Path to disk cache directory

Directory will be created if it doesn’t exist. Recommended: Use a fast SSD or NVMe drive.

capacity: CacheCapacity

Maximum disk cache size in bytes

Supports human-readable formats:

• "100gb" = 100 GB
• "10gb" = 10 GB (default)
• "1tb" = 1 TB

compression: bool

Enable LZ4 compression for disk storage (default: true)

Reduces disk usage by ~60% for typical NNTP articles. Slight CPU overhead for compression/decompression.

shards: usize

Number of shards for concurrent disk access (default: 4)

Higher values improve concurrency but use more file handles.

Trait Implementations

impl Clone for DiskCache

fn clone(&self) -> DiskCache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DiskCache

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

Formats the value using the given formatter.

impl Default for DiskCache

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DiskCache

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for DiskCache

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for DiskCache

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 DiskCache