From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dongsheng Yang Subject: bcache vs flashcache vs cache tiering Date: Tue, 14 Feb 2017 17:00:30 +0800 Message-ID: <58A2C72E.6090200@easystack.cn> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ceph-users-bounces-idqoXFIVOFJgJs9I8MT0rw@public.gmane.org Sender: "ceph-users" To: Sage Weil Cc: ceph-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, ceph-users-idqoXFIVOFJgJs9I8MT0rw@public.gmane.org List-Id: ceph-devel.vger.kernel.org Hi Sage and all, We are going to use SSDs for cache in ceph. But I am not sure which one is the best solution, bcache? flashcache? or cache tier? I found there are some CAUTION in ceph.com about cache tiering. Is cache tiering is already production ready? especially for rbd. thanx in advance. Yang