3 ms·

As far as I understand it, Ceph allows you to create distributed storage by using the hardware across your hosts. Can it be used to format a single shared bloc

• nyrikki 1y ago
  Ceph RBD can technically support multi-writer access through exclusive locking, but it won't be the same as multi-writer. You can set up a radosgw outside of the proxmox and use objects. But ceph is fundamentally a distributed object store, shared LUNs with block level multi-writer is fundamentally a tightly coupled solution. If you have a legacy need that has OCFS or a quorum drive, the underlying tools proxmox is an abstraction can sometimes be used as these types of systems tend to be pets. But if you were just using multi-writer because it was there, there are alternatives that are typically more robust under the shared nothing model like Ceph uses. But it is all tradeoffs and horses for courses.
  • throw0101d 1y ago
    > But ceph is fundamentally a distributed object store, shared LUNs with block level multi-writer is fundamentally a tightly coupled solution. There is Ceph and then there is CephFS, "a POSIX-compliant file system built on top of Ceph’s distributed object store, RADOS": * https://docs.ceph.com/en/latest/cephfs/ https://docs.ceph.com/en/latest/cephfs/ * https://pve.proxmox.com/wiki/Storage:_CephFS https://pve.proxmox.com/wiki/Storage:_CephFS
• guerby 1y ago
  From what I read about VMFS yes ceph allows you to have a shared block devices (RBD = rados block devices) across a cluster, and proxmox VE HA makes sure only one instance of the VM is active on the cluster to avoid having multiple writers to the same disk image.