On Tue, Oct 28, 2014 at 3:24 AM, Cristian Falcas
<cristi.falcas@xxxxxxxxx> wrote:
> 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
Where are you seeing the "ceph osd pool set ssd_cache cache-mode
writeback" from? You're setting that with the "ceph osd tier
cache-mode ssd_cache writeback" command. :)
-Greg
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