Module object_storage_tiering 

ObjectStorageTiering — hierarchical object storage tiering (hot/warm/cold).

Provides a production-quality tiered object storage system that automatically migrates objects between Hot, Warm, and Cold storage tiers based on configurable policies (access frequency, recency, size thresholds, cost optimization).

Type Aliases

Due to name collisions with existing crate types, all public types use the Ost prefix:

• OstStorageTier — Hot/Warm/Cold tier enum
• OstTierPolicy — tiering policy variants
• OstTierConfig — tier capacity and policy configuration
• OstTierTransition — record of an object moving between tiers

Example

use ipfrs_storage::object_storage_tiering::{
    ObjectStorageTiering, OstStorageTier, OstTierConfig, OstTierPolicy, TieredObject,
};

let config = OstTierConfig {
    hot_capacity_bytes: 1_024 * 1_024,
    warm_capacity_bytes: 10 * 1_024 * 1_024,
    cold_capacity_bytes: u64::MAX,
    policy: OstTierPolicy::AccessFrequency(5),
    promotion_threshold: 3,
    demotion_interval_us: 60_000_000,
};

let mut tiering = ObjectStorageTiering::new(config);

let obj = TieredObject {
    id: "obj-1".to_string(),
    size_bytes: 512,
    current_tier: OstStorageTier::Hot,
    access_count: 0,
    last_accessed: 0,
    created_at: 0,
    tags: vec![],
    cost_per_hour: 0.001,
};

let tier = tiering.store(obj).unwrap();
assert_eq!(tier, OstStorageTier::Hot);

Structs

ObjectStorageTiering

Production-quality hierarchical object storage tiering engine.

OstTierConfig

Capacity and policy configuration for the tiering engine.

OstTierTransition

Record of an object moving between storage tiers.

TieredObject

An object managed by the tiering engine.

TieringStats

Aggregate statistics for the tiering engine.

Enums

OstStorageTier

Three-level object storage tier hierarchy.

OstTierPolicy

Policy that drives automatic tier promotions and demotions.

TieringError

Errors returned by the tiering engine.