When we are doing cache tiering, we are more sensitive to short PG logs
because the dup op entries are not perfectly promoted from the base to
the cache.
See:
http://tracker.ceph.com/issues/38358http://tracker.ceph.com/issues/24320
This works around the problem by not testing short pg logs in combination
with cache tiering. This works because the short_pg_log.yaml fragment
sets the short log in the [global] section but the cache workloads overload
it (back to a large/default value) in the [osd] section.
Signed-off-by: Sage Weil <sage@redhat.com>