rados/singleton/all/thrash_cache_writeback_forward_none: thrash cache pool drain

Enable/disable cache pool against a running workload.

Backport: firefly
Signed-off-by: Sage Weil <sage@inktank.com>
(cherry picked from commit f8282df84d5ce760653ff1d3a9d8ea4e1391fba0)

diff --git a/suites/rados/singleton/all/thrash_cache_writeback_forward_none.yaml b/suites/rados/singleton/all/thrash_cache_writeback_forward_none.yaml
new file mode 100644 (file)
index 0000000..0c971e0
--- /dev/null
+++ b/suites/rados/singleton/all/thrash_cache_writeback_forward_none.yaml
@@ -0,0 +1,61 @@
+roles:
+- - mon.a
+  - mds.0
+  - osd.0
+  - osd.1
+  - osd.2
+- - osd.3
+  - osd.4
+  - osd.5
+  - client.0
+tasks:
+- install:
+- ceph:
+    log-whitelist:
+    - wrongly marked me down
+    - slow request
+- exec:
+    client.0:
+      - ceph osd pool create base 4
+      - ceph osd pool create cache 4
+      - ceph osd tier add base cache
+      - ceph osd tier cache-mode cache writeback
+      - ceph osd tier set-overlay base cache
+      - ceph osd pool set cache hit_set_type bloom
+      - ceph osd pool set cache hit_set_count 8
+      - ceph osd pool set cache hit_set_period 60
+      - ceph osd pool set cache target_max_objects 500
+- background_exec:
+    mon.a:
+      - while true
+      - do sleep 30
+      - echo forward
+      - ceph osd tier cache-mode cache forward
+      - sleep 10
+      - ceph osd pool set cache cache_target_full_ratio .001
+      - echo cache-try-flush-evict-all
+      - rados -p cache cache-try-flush-evict-all
+      - sleep 5
+      - echo cache-flush-evict-all
+      - rados -p cache cache-flush-evict-all
+      - sleep 5
+      - echo remove overlay
+      - ceph osd tier remove-overlay base
+      - sleep 20
+      - echo add writeback overlay
+      - ceph osd tier cache-mode cache writeback
+      - ceph osd pool set cache cache_target_full_ratio .8
+      - ceph osd tier set-overlay base cache
+      - done
+- rados:
+    clients: [client.0]
+    pools: [base]
+    max_seconds: 600
+    ops: 400000
+    objects: 10000
+    size: 1024
+    op_weights:
+      read: 100
+      write: 100
+      delete: 50
+      copy_from: 50