> -----Original Message----- > From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Burkhard Linke > Sent: 24 November 2016 14:06 > To: ceph-users@xxxxxxxxxxxxxx > Subject: Re: Stalling IO with cache tier > > Hi, > > > *snipsnap* > > > >> # ceph osd tier add cinder-volumes cache pool 'cache' is now (or > >> already was) a tier of 'cinder-volumes' > >> # ceph osd tier cache-mode cache writeback set cache-mode for pool > >> 'cache' to writeback # ceph osd tier set-overlay cinder-volumes cache > >> overlay for 'cinder-volumes' is now (or already was) 'cache' > >> # ceph osd pool set cache hit_set_type bloom set pool 6 hit_set_type > >> to bloom # ceph osd pool set cache hit_set_count 1 set pool 6 > >> hit_set_count to 1 # ceph osd pool set cache hit_set_period 3600 set > >> pool 6 hit_set_period to 3600 # ceph osd pool set cache > >> target_max_bytes 257698037760 set pool 6 target_max_bytes to > >> 257698037760 # ceph osd pool set cache cache_target_full_ratio 0.8 > >> set pool 6 cache_target_full_ratio to 0.8 > I think I remember seeing other people with this problem before, isn't there something you have to do in Openstack to make sure it has the correct keys to access the new cache pool? Or something like that. > Just my 2ct: > > A cache tier needs a complete setup, e.g. the target_max_objects setting is missing. Try to set all cache related settings to a sane > value. > > You might also want to create a simple backend pool first and test the cache tier with that pool. > > Regards, > Burkhard > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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