OpenAFS
What it is
OpenAFS is a free, open-source implementation of the AFS distributed filesystem. It lets users access network files as if they were local, and location transparency means the same pathname can remain in use when administrators move files between machines. AFS supports federated sharing and read-only replication across file servers. Its client Cache Manager keeps files in disk or memory cache to reduce repeated network requests. Kerberos-based authentication uses tokens to represent authenticated status, while directory access control lists define user and group permissions. Clients and servers mutually authenticate, and server processes encrypt particularly sensitive information sent to clients. However, commands in the fs, pts, and vos suites do not encrypt data before transmission. OpenAFS supports Linux, macOS, Windows, and self-hosted deployment. The project lists version 1.8.16.1 as a June 2026 UNIX/Linux maintenance release, with support for Linux mainline kernels up to 7.1. It is distributed under the IBM Public License; administrators assign each AFS volume a size limit or quota.
For and against
For
- Keeps pathnames usable when files move between machines
- Supports federated sharing and read-only replication
- Kerberos authentication and directory access control lists
- Available for Linux, macOS, and Windows
Against
- Some fs, pts, and vos commands do not encrypt transmitted data
- Administrators assign a size limit or quota to each volume
The verdict
OpenAFS combines shared network file access with caching, access controls, and replication. Be aware that some administration commands transmit data without encryption and that storage quotas are administrator-assigned.
Who it suits
OpenAFS may suit organizations such as companies or university departments that need shared network files across a defined group. It is intended for teams able to manage AFS cells and administrator-assigned volume limits.
Plans and prices
OpenAFS
Open-source distributed filesystem
Read 29 Sep 2026 · wiki.openafs.org
On the record
- Access controls
- Directory access control lists specify which users or groups can access files and what permissions they have.docs.openafs.org · read 29 Sep 2026
- Authentication
- OpenAFS supports Kerberos-based authentication and uses tokens to represent authenticated status.wiki.openafs.org · read 29 Sep 2026
- Caching
- The client Cache Manager stores files in local disk or memory cache to reduce repeated network requests.docs.openafs.org · read 29 Sep 2026
- Current release
- The home page lists OpenAFS 1.8.16.1 as a June 2026 maintenance release for UNIX/Linux, with support for Linux mainline kernels up to 7.1.openafs.org · read 29 Sep 2026
- Federated sharing
- AFS supports federated file sharing and read-only content replication across file servers.openafs.org · read 29 Sep 2026
- Intended users
- The documentation describes AFS cells as suitable for organizations such as companies, university departments, or other defined groups of users.docs.openafs.org · read 29 Sep 2026
- License
- The project states that OpenAFS is distributed under the IBM Public License.wiki.openafs.org · read 29 Sep 2026
- Location transparency
- Users can keep using the same pathname when administrators move files between machines.docs.openafs.org · read 29 Sep 2026
- Security
- AFS clients and servers mutually authenticate, and server processes encrypt particularly sensitive information sent to clients.docs.openafs.org · read 29 Sep 2026
- Security limitation
- The administration guide says commands in the fs, pts, and vos suites do not encrypt data before transmitting it.docs.openafs.org · read 29 Sep 2026
- Storage limits
- Each AFS volume has a size limit or quota assigned by the system administrator.docs.openafs.org · read 29 Sep 2026
- Support
- The project wiki points users to mailing lists, an IRC channel, and a page listing individuals and companies offering support or consulting.wiki.openafs.org · read 29 Sep 2026
- What it does
- OpenAFS is an open-source implementation of the AFS distributed filesystem for accessing network files as if they were local.openafs.org · read 29 Sep 2026
