NexentaStor is a proprietary operating system built by Nexenta Systems on top of the Nexenta Core Platform. It is optimized for use in virtualized server environments including NAS, iSCSI, and Fibre Channel applications, and is built around the ZFS file system. It features iSCSI support, unlimited incremental backups or 'snapshots', snapshot mirroring (replication), block level mirroring (CDP), integrated search within ZFS snapshots and a custom API. Through its focus on ZFS, it carries with it potential benefits for virtualized server farms in terms of performance and thin provisioning. The operating system is currently distributed as ISO and VMware disk images with pricing determined on a per-terabyte and per-server licensing basis.
A "community edition" is available free of charge for users with less than 18 terabyte of used disk space. It is the same as the enterprise version, except for the lack of paid plugins and commercial support. It can install many of the free and open source plugins that are developed and hosted on the community edition website.
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