Mastering Proxmox - Third Edition

Error while moving a Ceph journal to another drive

When a Ceph journal is on SSD, it provides the fastest performance in a small Ceph cluster with less than 50 OSDs. If a cluster was created initially with OSDs co-located on the same spinner HDD, then it needs to be moved to SSD for journaling. There are a few steps that must be followed to ensure a Ceph journal can be written onto a new drive. When using SSD as a journaling drive, always ensure not to overload it with too much journals for multiple OSDs. As a rule of thumb, one SSD should be used for every five OSDs. We can allocate multiple partitions on an SSD to store journals for multiple OSDs. If proper steps are not followed to create a journaling drive, the respective OSDs will not ...