Hi, Gregory,
Thank you for your answer!
Is there a way to not promote on "locking", when not using EC pools?
Is it possible to make this configurable?
We don't use EC pool. So, for us this meachanism is overhead. It only adds more load on both pools and network.
14.12.2017, 01:16, "Gregory Farnum" <gfar...@redhat.com>:
Voluntary “locking” in RADOS is an “object class” operation. These are not part of the core API and cannot run on EC pools, so any operation using them will cause an immediate promotion.On Wed, Dec 13, 2017 at 4:02 AM Захаров Алексей <zakharov....@yandex.ru> wrote:Hello,
I've found that when client gets lock on object then ceph ignores any promotion settings and promotes this object immedeatly.
Is it a bug or a feature?
Is it configurable?
Hope for any help!
Ceph version: 10.2.10 and 12.2.2
We use libradosstriper-based clients.
Cache pool settings:
size: 3
min_size: 2
crash_replay_interval: 0
pg_num: 2048
pgp_num: 2048
crush_ruleset: 0
hashpspool: true
nodelete: false
nopgchange: false
nosizechange: false
write_fadvise_dontneed: false
noscrub: true
nodeep-scrub: false
hit_set_type: bloom
hit_set_period: 60
hit_set_count: 30
hit_set_fpp: 0.05
use_gmt_hitset: 1
auid: 0
target_max_objects: 0
target_max_bytes: 18819770744832
cache_target_dirty_ratio: 0.4
cache_target_dirty_high_ratio: 0.6
cache_target_full_ratio: 0.8
cache_min_flush_age: 60
cache_min_evict_age: 180
min_read_recency_for_promote: 15
min_write_recency_for_promote: 15
fast_read: 0
hit_set_grade_decay_rate: 50
hit_set_search_last_n: 30
To get lock via cli (to test behavior) we use:
# rados -p poolname lock get --lock-tag weird_ceph_locks --lock-cookie `uuid` objectname striper.lock
Right after that object could be found in caching pool.
--
Regards,
Aleksei Zakharov
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Regards,
Aleksei Zakharov
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