# List of file systems

**Section:** Distributed parallel fault-tolerant file systems

| Name | By | License | OS | Description |
|---|---|---|---|---|
| Alluxio | UC Berkeley, Alluxio | Apache License 2.0 | cross-platform | An open-source virtual distributed file system (VDFS). |
| BeeGFS (formerly FhGFS) | Fraunhofer Society | Open-source (GPLv2 & BeeGFS EULA) | Linux | A free to use file system with optional professional support, designed for easy usage and high performance, used on some of the fastest computer clusters in the world. |
| Ceph | Inktank Storage, a company acquired by Red Hat | LGPL | Linux kernel | A massively scalable object store. CephFS was merged into the Linux kernel in 2010. |
| Chiron FS | - | - | - | It's a FUSE-based, transparent replication file system, layering on an existing file system and implementing at the file system level what RAID 1 does at the device level. |
| CloudStore | Kosmix | Apache License 2.0 | - | Google File System workalike. Replaced by Quantcast File System (QFS) |
| dCache | DESY and others | - | - | A write once filesystem, accessible via various protocols. |
| General Parallel File System (GPFS) | IBM | proprietary | AIX, Linux and Windows | Support replication between attached block storage. Symmetric or asymmetric (configurable). |
| Gfarm file system | Asia Pacific Grid | X11 License | Linux, macOS, FreeBSD, NetBSD and Solaris | Uses OpenLDAP or PostgreSQL for metadata and FUSE or LUFS for mounting. |
| GlusterFS | Gluster, a company acquired by Red Hat | GNU General Public License v3 | Linux, NetBSD, FreeBSD, OpenSolaris | A general purpose distributed file system for scalable storage. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. |
| Google File System (GFS) | Google | internal software | - | Focus on fault tolerance, high throughput and scalability. |
| Hadoop Distributed File System | Apache Software Foundation | Apache License 2.0 | Cross-platform | Open source GoogleFS clone. |
| IBRIX Fusion | IBRIX | proprietary software | - | - |
| Infinit | Infinit International, Inc | proprietary | cross-platform | A POSIX-compliant file system for both local area network and wide area networks. Infinit replicates blocks of data between the various storage resources composing the infrastructure (being local or through cloud API) in order to guarantee data reliability (durability and availability) through Byzantine fault tolerance and data rebalancing (i.e. |
| LizardFS | Skytechnology | GPL | cross-platform | An open source, highly available POSIX-compliant file system that supports Windows clients. |
| Lustre | originally developed by Cluster File Systems and currently supported by OpenSFS | GPL | Linux | A POSIX-compliant, high-performance filesystem used on a majority of systems in the Top-500 list of HPC systems. Lustre has high availability via storage failover. |
| MapR FS | MapR | Proprietary | Linux | Highly scalable, POSIX compliant, fault tolerant, read/write filesystem with a distributed, fault tolerant metadata service. It provides an HDFS and NFS interface to clients as well as a noSQL table interface and Apache Kafka compatible messaging system. |
| MooseFS | Core Technology | GPLv2 / proprietary | cross-platform (Linux, NetBSD, FreeBSD, macOS, OpenSolaris) | MooseFS is a fault tolerant, highly available and high performance scale-out network distributed file system. It spreads data over several physical commodity x86 servers, which are visible to the user as one namespace. |
| ObjectiveFS | Objective Security Corporation | proprietary | Linux, macOS | POSIX-compliant shared distributed filesystem. Uses object store as a backend. Runs on AWS S3, GCS and object store devices. |
| OneFS distributed file system | Isilon | - | FreeBSD | BSD-based OS on dedicated Intel based hardware, serving NFS v3 and SMB/CIFS to Windows, macOS, Linux and other UNIX clients under a proprietary software. |
| OIO-FS | OpenIO | Proprietary | Linux | OIO-FS provides file-oriented access to OpenIO SDS object storage backend. It is based on FUSE technology and presents a POSIX file system to users. |
| PanFS | Panasas | Proprietary | Linux, macOS, FreeBSD | A POSIX-compliant, high-performance, parallel filesystem used by HPC clusters. It uses erasure coding and snapshots for data protection, is based upon a scale-out object store, and is focused on transparent failure recovery and ease of use. |
| RozoFS | Rozo Systems | GNU GPLv2 | Linux | A POSIX DFS focused on fault-tolerance and high-performance, based on the Mojette erasure code to reduce significantly the amount of redundancy (compared to plain replication). |
| Scality | Scality ring | Proprietary software | Linux | A POSIX file system focused on high availability and performance. Also provides S3/REST/NFS interfaces. |
| Tahoe-LAFS | Tahoe-LAFS Software Foundation | GNU GPL 2+ and other | Windows, Linux, macOS | A secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system. |
| WekaIO Matrix | WekaIO | Proprietary software | Linux | An extreme performance, NVMe-optimized parallel filesystem that includes Distributed Coding (similar to Erasure Coding), instantaneous snapshots, tiering to S3 datastores, runs in the cloud or on-prem. |
| XtreemFS | Contrail E.U. project, the German MoSGrid project and the German project "First We Take Berlin" | open-source (BSD) | Linux, Solaris, macOS, Windows | A cross-platform file system for wide area networks. It replicates the data for fault tolerance and caches metadata and data to improve performance over high-latency links. |

Question: What differentiates Lustre and MapR FS?