It looks like you're using a kernel RBD mount in the second case? I imagine your kernel doesn't support caching pools and you'd need to upgrade for it to work. -Greg On Tuesday, July 1, 2014, ????????? ??????? <v1t83 at yandex.ru> wrote: > Good day! > I have server with Ubunu 14.04 and installed ceph firefly. Configured > main_pool (2 osd) and ssd_pool (1 ssd osd). I want use ssd_pool as cache > pool for main_pool > > ceph osd tier add main_pool ssd_pool > ceph osd tier cache-mode ssd_pool writeback > ceph osd tier set-overlay main_pool ssd_pool > > ceph osd pool set ssd_pool hit_set_type bloom > ceph osd pool set ssd_pool hit_set_count 1 > ceph osd pool set ssd_pool hit_set_period 600 > ceph osd pool set ssd_pool target_max_bytes 100000000000 > > If use tgt as: > tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 --bstype > rbd --backing-store main_pool/store_main --bsopts "conf=/etc/ceph/ceph.conf" > and then connected from iscsi initiator to this Lun1, i see that ssd_pool > is used as cache (i see through iostat -x 1) but slow speed > > If use tgt as (or other sush as scst, iscsitarget): > tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b > /dev/rbd1 (where rbd1=main_pool/store_main) > and then connected from iscsi initiator to this Lun1, i see that ssd_pool > is not used, that write through to 2 osd > > Help me, anyone work this iscsi and cache pool? > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com <javascript:;> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Software Engineer #42 @ http://inktank.com | http://ceph.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140701/d73d56a8/attachment.htm>
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