November 2017
Intermediate to advanced
494 pages
14h 29m
English
Content preview from Mastering Proxmox - Third Edition
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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 ...
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