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DAOS

DAOS is ranked #11 of 28 in software-defined storage software on Freedom251. It runs on API, Linux, Self-hosted.

Compared on software-defined storage software

S3 compatibility: Yes

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DAOS

Purpose: DAOS is an open-source, software-defined storage system for AI and HPC workloads.
Data model: Its core interface is a scalable key-value-array store, with data models including POSIX namespaces and HDF5 datasets built over it.
Storage pools: Pools can span all or some storage engines, and pool access can be controlled with fine-grained ACLs.
Datasets and snapshots: DAOS containers represent datasets, can be snapshotted, and support fine-grained access control.
Performance: DAOS distributes filesystem data and metadata across storage engines and can use RDMA through libfabric or UCX when available.
Data protection: Objects can use erasure coding, replication, or no data protection; DAOS can trigger self-healing rebuilds when an engine becomes unresponsive.
Integrations: The DAOS client ecosystem includes libdfs for POSIX namespaces, and its user guide documents a PyTorch interface for loading data from DAOS.
Security: DAOS supports access control lists on pools and individual containers.
Supported platform: DAOS 2.8 is built for Linux on x86_64; its supported server and client distributions include SLES 15 SP6/SP7, openSUSE Leap 15.6, and EL 9.6/9.7.
Notable limits: DAOS 2.8 does not support Ubuntu, Fedora, CentOS Stream, or RHEL 8 and its clones.
Support: The DAOS site lists member support by email and links to a support center and Jira bug tracker.
License: The DAOS GitHub repository identifies the software license as BSD-2-Clause Plus Patent License.
Storage interface: Its baseline interface is a high-performance, scalable key-value-array store exposed through libdaos.
Deployments: DAOS can be deployed on premises or in cloud environments.

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Where it ranks on Freedom251

Best Software-Defined Storage Software in 2026#11 of 28
Best Storage Replication Software in 2026#9 of 23

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Sources

daos.io· checked 2 Oct 2026
daos.io/daos-overview· checked 2 Oct 2026
docs.daos.io/v2.8/user/pytorch/· checked 2 Oct 2026
docs.daos.io/v2.8/release/support_matrix/· checked 2 Oct 2026
github.com/daos-stack/daos· checked 2 Oct 2026
docs.daos.io/latest/· checked 3 Oct 2026