Ceph is a distributed object store and file system designed to provide
excellent performance, reliability and scalability.
-.Some of the advantages of Ceph are:
-- Easy setup and management with CLI and GUI support on Proxmox VE
+.Some advantages of Ceph on {pve} are:
+- Easy setup and management with CLI and GUI support
- Thin provisioning
- Snapshots support
- Self healing
-- No single point of failure
- Scalable to the exabyte level
- Setup pools with different performance and redundancy characteristics
- Data is replicated, making it fault tolerant
- Runs on economical commodity hardware
- No need for hardware RAID controllers
-- Easy management
- Open source
For small to mid sized deployments, it is possible to install a Ceph server for
http://docs.ceph.com/docs/luminous/start/hardware-recommendations/[Ceph's website].
.Avoid RAID
-While RAID controller are build for storage virtualisation, to combine
-independent disks to form one or more logical units. Their caching methods,
-algorithms (RAID modes; incl. JBOD), disk or write/read optimisations are
-targeted towards aforementioned logical units and not to Ceph.
+As Ceph handles data object redundancy and multiple parallel writes to disks
+(OSDs) on its own, using a RAID controller normally doesn’t improve
+performance or availability. On the contrary, Ceph is designed to handle whole
+disks on it's own, without any abstraction in between. RAID controller are not
+designed for the Ceph use case and may complicate things and sometimes even
+reduce performance, as their write and caching algorithms may interfere with
+the ones from Ceph.
WARNING: Avoid RAID controller, use host bus adapter (HBA) instead.
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