Hello,
In the documentation about creating an cache pool, you find this:
"Cache mode
The most important policy is the cache mode:
ceph osd pool set foo-hot cache-mode writeback"
But when trying to run the above command, I get an error:
ceph osd pool set ssd_cache cache-mode writeback
Invalid command: cache-mode not in
size|min_size|crash_replay_interval|pg_num|pgp_num|crush_ruleset|hashpspool|hit_set_type|hit_set_period|hit_set_count|hit_set_fpp|debug_fake_ec_pool|target_max_bytes|target_max_objects|cache_target_dirty_ratio|cache_target_full_ratio|cache_min_flush_age|cache_min_evict_age|auid
osd pool set <poolname>
size|min_size|crash_replay_interval|pg_num|pgp_num|crush_ruleset|hashpspool|hit_set_type|hit_set_period|hit_set_count|hit_set_fpp|debug_fake_ec_pool|target_max_bytes|target_max_objects|cache_target_dirty_ratio|cache_target_full_ratio|cache_min_flush_age|cache_min_evict_age|auid
<val> {--yes-i-really-mean-it} : set pool parameter <var> to <val>
Error EINVAL: invalid command
Is this deprecated? I'm using version 0.80.
Those are the commands I used to create the cache:
# Set up a read/write cache pool ssd_cache for pool images:
ceph osd tier add images ssd_cache
ceph osd tier cache-mode ssd_cache writeback
# Direct all traffic for images to ssd_cache:
ceph osd tier set-overlay images ssd_cache
ceph osd pool set ssd_cache cache-mode writeback
# Set the target size and enable the tiering agent for ssd_cache:
ceph osd pool set ssd_cache hit_set_type bloom
ceph osd pool set ssd_cache hit_set_count 1
ceph osd pool set ssd_cache hit_set_period 3600 # 1 hour
ceph osd pool set ssd_cache target_max_bytes 400000000000 # 500 GB
# will begin flushing dirty objects when 40% of the pool is dirty and
begin evicting clean objects when we reach 80% of the target size.
ceph osd pool set ssd_cache cache_target_dirty_ratio .4
ceph osd pool set ssd_cache cache_target_full_ratio .8
Best regards,
Cristian Falcas
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