Struct StoreMetrics 

pub struct StoreMetrics {

    pub total_blocks: u64,
    pub tier0_blocks: u64,
    pub tier1_blocks: u64,
    pub tier2_blocks: u64,
    pub tier3_blocks: u64,
    pub tier1_bytes: u64,
    pub tier2_bytes: u64,
    pub tier3_bytes: u64,
    pub total_reads: u64,
    pub total_writes: u64,
    pub total_evictions: u64,
    pub total_upgrades: u64,
    pub total_downgrades: u64,
    pub total_reconstructions: u64,
    pub total_checksum_failures: u64,
    pub total_compactions: u64,
    pub tier_flips_last_minute: f32,
    pub avg_score_tier1: f32,
    pub avg_score_tier2: f32,
    pub avg_score_tier3: f32,
}

Aggregate metrics for the temporal tensor store.

All counters are monotonically increasing over the lifetime of the store. Gauge-style fields (e.g. tier0_blocks) reflect the current state.

Fields

total_blocks: u64

Total number of live blocks across all tiers.

tier0_blocks: u64

Number of blocks in tier 0 (raw / uncompressed).

tier1_blocks: u64

Number of blocks in tier 1 (hot, 8-bit).

tier2_blocks: u64

Number of blocks in tier 2 (warm, 7/5-bit).

tier3_blocks: u64

Number of blocks in tier 3 (cold, 3-bit).

tier1_bytes: u64

Total stored bytes in tier 1.

tier2_bytes: u64

Total stored bytes in tier 2.

tier3_bytes: u64

Total stored bytes in tier 3.

total_reads: u64

Cumulative read count.

total_writes: u64

Cumulative write count.

total_evictions: u64

Cumulative eviction count.

total_upgrades: u64

Cumulative upgrade count.

total_downgrades: u64

Cumulative downgrade count.

total_reconstructions: u64

Cumulative reconstruction count.

total_checksum_failures: u64

Cumulative checksum failure count.

total_compactions: u64

Cumulative compaction count.

tier_flips_last_minute: f32

Tier flips per block per minute over the last minute.

avg_score_tier1: f32

Average score of tier 1 blocks.

avg_score_tier2: f32

Average score of tier 2 blocks.

avg_score_tier3: f32

Average score of tier 3 blocks.

Implementations

impl StoreMetrics

pub fn new() -> Self

Create a new zeroed metrics struct.

pub fn compression_ratio(&self) -> f32

Compression ratio: raw f32 bytes / stored bytes.

Raw bytes are estimated as total_blocks * average_tensor_len * 4, but since we lack per-block tensor lengths here, we approximate with the tier-0 identity: each tier-0 block is already f32, so the stored bytes for tier 0 equal the raw bytes. The ratio is therefore:

(tier0_raw + tier1_raw + tier2_raw + tier3_raw) / total_stored_bytes

Because we don’t track raw bytes per tier at this level, we report total_stored_bytes / total_stored_bytes as a baseline and let callers that have richer context compute the true ratio. For a simple heuristic, we use the known compression ratios: tier1 ~4x, tier2 ~5.5x, tier3 ~10.67x.

pub fn total_stored_bytes(&self) -> u64

Total stored bytes across all compressed tiers (1, 2, 3).

Tier 0 blocks are raw f32 and not tracked separately; callers can compute tier-0 bytes as tier0_blocks * tensor_len * 4 if needed.

pub fn format_report(&self) -> String

Generate a human-readable multi-line status report.

pub fn format_json(&self) -> String

Generate a JSON representation (no serde dependency).

pub fn health_check(&self) -> StoreHealthStatus

Automated health assessment.

Trait Implementations

impl Clone for StoreMetrics

fn clone(&self) -> StoreMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StoreMetrics

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

Formats the value using the given formatter.

impl Default for StoreMetrics

fn default() -> StoreMetrics

Returns the “default value” for a type.