Creating a cache tier

In the last recipe, we created a pool, cache-pool, based on SSDs. We will now use this pool as a cache tier for the erasure-coded pool, EC-pool, that we created earlier in this chapter:

The upcoming instructions will guide you through the creation of a cache tier with the writeback mode and how to set the overlay with an EC-pool.

How to do it...

Following this set of steps, we will create a cache tier for our erasure-coded pool:

1. Create a cache tier that will associate storage-pools with cache-pools. The syntax is ceph osd tier add <storage_pool> <cache_pool>:

        # ceph osd tier add EC-pool cache-pool

2. Set the cache mode as either writeback or read-only. In this demonstration, we will...