System Administration

Extend a Ceph cluster with slower HDD disks with SSD cache-tiering

Context: Add slower & higher latency HDD to an SSD only Ceph cluster. I’ve chosen to add the slow disks to the existing cluster instead of creating another dedicated cluster. But since HDD and SSD are mixed, we need some tuning in order to limit the impact on cluster performance. In the below example, I’ll …

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