Software-defined storage (SDS)
Software-defined storage solutions enables the decoupling of the software on the one side and the hardware on the other. The pure storage solutions are not connected to the hardware, which means that they can be replaced and, in particular, the technology and price can be optimized for the specific application. While highly available applications benefit hugely from the speed of modern NVMe SSDs, an archiving system, for example, can certainly operate on more cost-effective standard HDDs.
At the same time, the administrative work, e.g. the provisioning, is simplified via centralization. Deduplication and replication are generally already integrated into the SDS systems and established interfaces to monitoring and reporting tools exist.
Ceph
Ceph is an Open Source solution that can provide block-, file-, and object-based storage as a distributed system and meets the requirements associated with the term “software-defined storage”.
GlusterFS
GlusterFS is a network-capable file system that can consolidate the local storage capabilities of different systems connected via a traditional network. GlusterFS is error-tolerant thanks to the independent distribution of the data in the network and scales with the number of systems used. An interesting feature for many existing systems is the possibility of accessing GlusterFS storage via the NFS protocol.
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