Tools » teuthology

we want to do this to start:

ceph osd pool create base 123
ceph osd pool create cache 123
ceph osd tier add base cache
ceph osd pool set cache target_max_objects 1000 # or something

in one thread, run a workload against the base pool.

in parallel, in a loop:

ceph osd tier cache-mode cache writeback
ceph osd tier set-overlay base cache
sleep 120
ceph osd tier cache-mode cache forward
rados -p cache cache-try-flush-evict-all
rados -p cache cache-flush-evict-all
ceph osd tier unset-overlay base
sleep 30

the trick is that the loop should terminate when the workload finishes. either need a generic teuthology task to run a parallel job and kill it when it's sibling finishes, or need to make a simple teuthology task to start the above loop in a background thread and stop it in the finally: section.

the workload itself can be something like the below, which specifically targest the base pool (and, implicitly, the cache pool, when it gets enabled):

- rados:
    clients: [client.0]
    pools: [base]
    ops: 4000
    objects: 500
    op_weights:
      read: 100
      write: 100
      delete: 50
      copy_from: 50
      flush: 50
      try_flush: 50
      evict: 50
      snap_create: 50
      snap_remove: 50
      rollback: 50