Struct BlockMeta 

pub struct BlockMeta {
    pub ema_rate: f32,
    pub access_window: u64,
    pub last_access: u64,
    pub access_count: u64,
    pub current_tier: Tier,
    pub tier_since: u64,
}

Per-block metadata tracked by the tiered store.

Fields

ema_rate: f32

Exponentially-weighted moving average of access rate.

access_window: u64

Sliding window bitmap of tick-level activity (1 bit per tick). popcount gives the number of active ticks in the last 64.

last_access: u64

Timestamp (tick) of the most recent access.

access_count: u64

Cumulative access count.

current_tier: Tier

Current storage tier.

tier_since: u64

Tick at which the block was last assigned to its current tier.

Implementations

impl BlockMeta

pub fn new(now: u64) -> Self

Create metadata for a freshly inserted block.

Trait Implementations

impl Clone for BlockMeta

fn clone(&self) -> BlockMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BlockMeta

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

Formats the value using the given formatter.