Hi all,
We have a erasure coded pool 'ecdata' and a replicated pool 'cache'
acting as writeback cache upon it.
When running 'rados -p ecdata bench 1000 write', it starts filling up
the 'cache' pool as expected.
I want to see what happens when it starts evicting, therefore I've done:
ceph osd pool set cache target_max_bytes $((200*1024*1024*1024))
When it start to evict the objects to 'ecdata', the cache osds are all
crashing. I logged an issue : http://tracker.ceph.com/issues/8982
I enabled the cache with this commands:
ceph osd pool create cache 1024 1024
ceph osd erasure-code-profile set profile11 k=8 m=3 ruleset-failure-domain=osd
ceph osd pool create ecdata 128 128 erasure profile11
ceph osd tier add ecdata cache
ceph osd tier cache-mode cache writeback
ceph osd tier set-overlay ecdata cache
Is there something else that I should configure?
Thanks!
Kenneth
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