How to map a pool to a dedicated set of OSDs?

Solution Verified - Updated -

Issue

  • How to map a pool to a dedicated set of OSDs via the CRUSH map?

  • How to create a cache tier with SSD OSDs?

  • How to create a pool specifically on SSD OSDs for faster data reads/writes, while keeping other pools on HDDs?

Environment

  • Red Hat Ceph Storage 1.2.3

  • Red Hat Ceph Storage 1.3

  • Red Hat Ceph Storage 2.0

  • Scenarios where certain pools should be created on SSD OSDs while others on HDDs, for example, Cache tiering.

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