Hi, I don't really have a solution but I can confirm I had the same problem trying to deploy my new Jewel cluster. I reinstalled the cluster with Hammer and everything is working as I expect it to (that is; writes hit the backing pool asynchronously) Although other than you I noticed the same problem with EC backed as well as replicated backed caches. - HP On Wed, 2016-06-01 at 19:06 +0900, 한승진 wrote: > Hi All. > > My name is John Haan. > > I've been testing Cache Pool using Jewel version on ubuntu 16.04 OS. > > I implemented 2 types of cache tiers. > > first one is cache pool + erasure pool and the other one is cache > pool + replicated pool > > I choose writeback mode of cache mode. > > vdbench and rados bench are used for test tool. > > 1. cache pool + erasure pool > (1) write operation : objects are saved to cache pool. > (2) read operation : objects are loaded from cache pool. > > 2. cache pool + replicated pool > (1) write operation : objects are saved to replicated pool > (2) read operation : objects are loaded from cache pool. > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com