Ceph is an open source, distributed storage system designed to provide highly scalable and reliable storage for a wide range of applications. Ceph provides object, block, and file storage in a unified storage cluster, and allows users to manage and access data anywhere in the cluster, without the need for manual configuration. Ceph is self-managing and self-healing, and its modular design allows for easy scaling and customization. It is designed to be fault-tolerant and highly available, providing data protection and replication. Ceph is an ideal platform for applications requiring high performance, scalability, and data durability.
StorPool is a high performance primary block storage system, so it is a good alternative to one of the use cases provided by Ceph, but a very good one in this use case.