open source storage

Examples of open source storage

Ceph. Distributed block, file and object storage that scales across clustered server nodes. Vendors offering commercially supported products based on Ceph include Canonical, Fujitsu, Red Hat and SUSE.

Gluster File System. Scalable network file system. Red Hat is the major vendor of a commercially supported version of GlusterFS.

Lustre. Parallel distributed file system designed for high-performance computing environments. Vendors offering products with commercial support based on Lustre include Cray, Dell EMC, Fujitsu, Hewlett Packard Enterprise (HPE), SGI and Seagate Technology.

OpenStack Block Storage service, known by its project name, Cinder. Software to create and centrally manage a service designed to present storage resources to users of OpenStack Nova compute instances. More than 100 Cinder block storage drivers are available to enable different back-end storage. The Ceph RADOS Block Device is the most popular Cinder driver in production use. The OpenStack community makes available the default logical volume manager for Linux. Major storage vendors with Cinder block storage drivers include Dell EMC, IBM, HPE, Hitachi Data Systems and NetApp.

OpenStack Shared File Systems service, known by its project name, Manila. Software designed to provide a set of services to manage shared file systems, such as NFS exports and CIFS shares, in cloud environments. Storage vendors with Manila drivers include Dell EMC, HPE, Hitachi Data Systems, IBM, NetApp and Red Hat. Manila also supports niche file system protocols such as Gluster, Hadoop Distributed File System, MapR-FS and Ceph Filesystem (Ceph FS).

OpenStack Object Storage service, known by its project name, Swift. Distributed object storage designed for large quantities of unstructured data. Vendors that support Swift include HPE, IBM, Oracle, Red Hat, SUSE SwiftStack and VMware.

OpenZFS. File system and logical volume manager based on the ZFS technology created by Sun Microsystems. Built-in enterprise storage features include replication, deduplication, compression, snapshots, clones and data protection. Vendors with commercial products based on OpenZFS include Cloudscaling, Datto, Delphix, Joyent, Nexenta, SoftNAS and Spectra Logic.

FreeNAS. NAS based on the FreeBSD operating system and the OpenZFS file system and logical volume manager.

Examples of storage vendors that use open source software as an underlying technology include Dell EMC (Isilon), Nexenta, Nexsan, Nutanix and Scale Computing.

Pros and cons of open source storage

Advantages of open source storage include no upfront software cost, the ability to run on commodity hardware, and freely available source code that a developer can inspect, customize or tune to suit the specific needs of an organization. Any developer is free to join an open source storage project, participate in its development and submit suggestions for future improvements. Open source advocates claim the transparent, public development process and peer review promote high quality, reliability and security, and offers the potential for speedier innovation than proprietary software.

Open source storage has a number of potential disadvantages. The software can be complex and difficult to use, require trained staff to deploy and maintain, and suffer from driver interoperability issues. Tuning and maintaining open source storage can become a time-consuming and costly endeavor for an IT organization.

Many enterprises opt to purchase a tested and supported version of open source storage software from a commercial vendor to ease deployment, maintenance and troubleshooting problems. They generally select hardware from suppliers with whom the vendor has partnered or from a list of tested and certified options.