Module cloud 

Cloud Storage Backends (#72)

Artifact storage abstraction supporting local, S3, Azure, and GCS backends.

Toyota Principle: Heijunka (平準化)

Level workloads across storage tiers - artifacts are stored content-addressably to enable efficient caching and deduplication across storage backends.

Example

use entrenar::storage::cloud::{ArtifactBackend, LocalBackend};
use std::path::PathBuf;

fn example() -> Result<(), Box<dyn std::error::Error>> {
    let backend = LocalBackend::new(PathBuf::from("/tmp/artifacts"));
    let hash = backend.put("model.safetensors", b"test data")?;
    let data = backend.get(&hash)?;
    Ok(())
}

Structs

ArtifactMetadata

Artifact metadata

AzureConfig

Azure Blob Storage configuration

GCSConfig

Google Cloud Storage configuration

InMemoryBackend

In-memory artifact backend for testing

LocalBackend

Local filesystem artifact backend

MockS3Backend

Mock S3 backend for testing (simulates S3 behavior in memory)

S3Config

S3 backend configuration

Enums

BackendConfig

Unified artifact backend configuration

CloudError

Cloud storage errors

Traits

ArtifactBackend

Trait for artifact storage backends

Functions

compute_hash

Compute SHA-256 hash of data

Type Aliases

Result

Result type for cloud operations