Hi Karan, May be setting the dirty byte ratio (flush) and the full ratio (eviction). Just try to see if it makes any difference - cache_target_dirty_ratio .1 - cache_target_full_ratio .2 Tune the percentage as desired relatively to target_max_bytes and target_max_objects. The first threshold reached will trigger flush or eviction (num objects or num bytes) JC On Sep 13, 2014, at 15:23, Karan Singh <karan.singh at csc.fi> wrote: > Hello Cephers > > I have created a Cache pool and looks like cache tiering agent is not able to flush/evict data as per defined policy. However when i manually evict / flush data , it migrates data from cache-tier to storage-tier > > Kindly advice if there is something wrong with policy or anything else i am missing. > > Ceph Version: 0.80.5 > OS : Cent OS 6.4 > > Cache pool created using the following commands : > > ceph osd tier add data cache-pool > ceph osd tier cache-mode cache-pool writeback > ceph osd tier set-overlay data cache-pool > ceph osd pool set cache-pool hit_set_type bloom > ceph osd pool set cache-pool hit_set_count 1 > ceph osd pool set cache-pool hit_set_period 300 > ceph osd pool set cache-pool target_max_bytes 10000 > ceph osd pool set cache-pool target_max_objects 100 > ceph osd pool set cache-pool cache_min_flush_age 60 > ceph osd pool set cache-pool cache_min_evict_age 60 > > > [root at ceph-node1 ~]# date > Sun Sep 14 00:49:59 EEST 2014 > [root at ceph-node1 ~]# rados -p data put file1 /etc/hosts > [root at ceph-node1 ~]# rados -p data ls > [root at ceph-node1 ~]# rados -p cache-pool ls > file1 > [root at ceph-node1 ~]# > > > [root at ceph-node1 ~]# date > Sun Sep 14 00:59:33 EEST 2014 > [root at ceph-node1 ~]# rados -p data ls > [root at ceph-node1 ~]# > [root at ceph-node1 ~]# rados -p cache-pool ls > file1 > [root at ceph-node1 ~]# > > > [root at ceph-node1 ~]# date > Sun Sep 14 01:08:02 EEST 2014 > [root at ceph-node1 ~]# rados -p data ls > [root at ceph-node1 ~]# rados -p cache-pool ls > file1 > [root at ceph-node1 ~]# > > > > [root at ceph-node1 ~]# rados -p cache-pool cache-flush-evict-all > file1 > [root at ceph-node1 ~]# > [root at ceph-node1 ~]# rados -p data ls > file1 > [root at ceph-node1 ~]# rados -p cache-pool ls > [root at ceph-node1 ~]# > > > Regards > Karan Singh > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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