Other Integrations

Relevant source files

• .github/actions/test_behavior_integration_object_store/action.yml
• .github/scripts/test_behavior/test_plan.py
• .github/workflows/ci_integration_object_store.yml
• .github/workflows/test_behavior_integration_object_store.yml
• bin/oay/Cargo.lock
• bin/oay/Cargo.toml
• bin/ofs/Cargo.lock
• bin/ofs/Cargo.toml
• bin/oli/Cargo.lock
• bin/oli/Cargo.toml
• core/Cargo.lock
• integrations/dav-server/Cargo.toml
• integrations/fuse3/Cargo.toml
• integrations/object_store/Cargo.toml
• integrations/object_store/README.md
• integrations/object_store/examples/basic.rs
• integrations/object_store/examples/datafusion.rs
• integrations/object_store/src/amazon_s3.rs
• integrations/object_store/src/lib.rs
• integrations/object_store/src/store.rs
• integrations/object_store/src/utils.rs
• integrations/object_store/tests/behavior/delete.rs
• integrations/object_store/tests/behavior/get.rs
• integrations/object_store/tests/behavior/main.rs
• integrations/object_store/tests/behavior/put.rs
• integrations/parquet/Cargo.toml

This page documents OpenDAL's ecosystem integrations beyond the object_store crate. These integrations enable OpenDAL to work with various data access patterns, protocols, and platform-specific APIs. For information about the object_store integration specifically, see object_store Integration.

Integration Architecture Overview

OpenDAL provides several specialized integration crates that bridge OpenDAL's unified storage API with different data access paradigms and protocols.

Integration Architecture Overview
Sources: integrations/fuse3/Cargo.toml18-42 integrations/dav-server/Cargo.toml18-42 integrations/parquet/Cargo.toml18-48 bin/ofs/Cargo.toml47-56 bin/oay/Cargo.toml42-48

FUSE Integration

The fuse3_opendal crate provides FUSE (Filesystem in Userspace) integration, allowing any OpenDAL storage service to be mounted as a local filesystem on Unix-like systems.

Implementation Details

The FUSE integration implements the FUSE protocol to translate filesystem operations into OpenDAL operations:

FUSE Integration Flow
Sources: integrations/fuse3/Cargo.toml30-39 bin/ofs/Cargo.toml47-51

Usage in ofs Application

The ofs application uses fuse3_opendal to mount storage services as filesystems:

Platform	Integration	Purpose
Linux, FreeBSD, macOS	fuse3_opendal	FUSE-based filesystem mounting
Windows	cloud_filter_opendal	Windows Cloud Filter API support

Sources: bin/ofs/Cargo.toml47-56

WebDAV Integration

The dav-server-opendalfs crate implements a WebDAV server backend using OpenDAL, enabling access to storage services through the WebDAV protocol.

WebDAV Implementation

WebDAV Integration Architecture
Sources: integrations/dav-server/Cargo.toml18-42

Usage in oay Gateway

The oay application uses dav-server-opendalfs to expose storage services via WebDAV:

oay WebDAV Integration
Sources: bin/oay/Cargo.toml36-48

Parquet Integration

The parquet_opendal crate provides integration with Apache Parquet, implementing async I/O traits for reading and writing Parquet files through OpenDAL.

Parquet I/O Implementation

The integration implements Parquet's async I/O traits:

Trait	Purpose	OpenDAL Mapping
AsyncFileReader	Reading Parquet files	Maps to Operator.reader()
AsyncFileWriter	Writing Parquet files	Maps to Operator.writer()

Integration Features

Parquet Integration Components
Sources: integrations/parquet/Cargo.toml30-48

Example Use Cases

The Parquet integration enables:

• Reading columnar data from any OpenDAL-supported storage
• Writing Parquet files to cloud storage services
• Integration with Apache Arrow and DataFusion
• Efficient analytics workloads over distributed storage

Sources: integrations/parquet/Cargo.toml49-56

Platform-Specific Integrations

Windows Cloud Filter

For Windows systems, OpenDAL provides cloud_filter_opendal integration that uses the Windows Cloud Filter API for more native filesystem integration:

Windows Cloud Filter Integration
Sources: bin/ofs/Cargo.toml53-56

Integration Dependencies

The integration crates have the following dependency relationships:

Integration	Core Dependencies	External Dependencies
fuse3_opendal	opendal, tokio	fuse3, libc
dav-server-opendalfs	opendal, bytes	dav-server, futures
parquet_opendal	opendal, bytes	parquet, arrow
cloud_filter_opendal	opendal	cloud-filter

Sources: integrations/fuse3/Cargo.toml30-39 integrations/dav-server/Cargo.toml30-36 integrations/parquet/Cargo.toml30-39 bin/ofs/Cargo.toml53-56