Hi Karan, may be the statistical information about the temperature of the objects in the pool that has to be maintained by the flushing/eviciting agent? Otherwise, hard to say from my seat. JC On Sep 14, 2014, at 08:05, Karan Singh <karan.singh at csc.fi> wrote: > Thanks JC , it worked , now cache tiering agent is migrating data between tiers. > > > But Now , i am seeing a new ISSUE : Cache-pool has got some EXTRA objects , that is not visible with # rados -p cache-pool ls but under #ceph df i can see the count of those objects. > > [root at ceph-node1 ~]# ceph df | egrep -i "objects|pool" > POOLS: > NAME ID USED %USED OBJECTS > EC-pool 15 1000M 1.21 2 > cache-pool 16 252 0 3 > [root at ceph-node1 ~]# > [root at ceph-node1 ~]# rados -p cache-pool ls > [root at ceph-node1 ~]# rados -p cache-pool cache-flush-evict-all > [root at ceph-node1 ~]# rados -p cache-pool ls > [root at ceph-node1 ~]# ceph df | egrep -i "objects|pool" > POOLS: > NAME ID USED %USED OBJECTS > EC-pool 15 1000M 1.21 2 > cache-pool 16 252 0 3 > [root at ceph-node1 ~]# > > > # Also when i create ONE object manually , #ceph df says that 2 objects has been added. From where this extra object coming > > [root at ceph-node1 ~]# ceph df | egrep -i "objects|pool" > POOLS: > NAME ID USED %USED OBJECTS > EC-pool 15 1000M 1.21 2 > cache-pool 16 252 0 3 > [root at ceph-node1 ~]# > [root at ceph-node1 ~]# > [root at ceph-node1 ~]# rados -p cache-pool put test /etc/hosts ( I have added one object in this step ) > [root at ceph-node1 ~]# rados -p cache-pool ls ( when i list i can see only 1 object that i have recently created) > test > [root at ceph-node1 ~]# ceph df | egrep -i "objects|pool" > POOLS: > NAME ID USED %USED OBJECTS > EC-pool 15 1000M 1.21 2 > cache-pool 16 651 0 5 (Why it is showing 5 objects , while earlier its showing 3 Objects , why it has increased by 2 on adding only 1 object ) > [root at ceph-node1 ~]# > > > - Karan - > > On 14 Sep 2014, at 03:42, Jean-Charles LOPEZ <jc.lopez at inktank.com> wrote: > >> 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 >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users at lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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