From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wido den Hollander Subject: Re: Feedback: default FS pools and newfs behavior Date: Wed, 21 May 2014 21:21:03 +0200 Message-ID: <537CFC9F.4000009@42on.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from websrv.42on.com ([31.25.102.167]:36659 "EHLO websrv.42on.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752713AbaEUTVG (ORCPT ); Wed, 21 May 2014 15:21:06 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: John Spray , Ceph Development On 05/21/2014 05:32 PM, John Spray wrote: > In response to #8010[1], I'm looking at making it possible to > explicitly disable CephFS, so that the (often unused) filesystem pools > don't hang around if they're unwanted. > > The administrative behavior would change such that: > * To enable the filesystem it is necessary to create two pools and > use "ceph newfs " > * There's a new "ceph rmfs" command to disable the filesystem and > allow removing its pools > * Initially, the filesystem is disabled and the 'data' and 'metadata' > pools are not created by default > > There's an initial cut of this on a branch: > https://github.com/ceph/ceph/commits/wip-nullfs > > Questions: > * Are there strong opinions about whether the CephFS pools should > exist by default? I think it makes life simpler if they don't, > avoiding "what the heck is the 'data' pool?" type questions from > newcomers. +1 We simpler the clusters are, the better imho. A lot of users don't require CephFS, so don't enable what ain't used. > * Is it too unfriendly to require users to explicitly create pools > before running newfs, or do we need to auto-create pools when they run > newfs? Auto-creating some pools from newfs is a bit awkward > internally because it requires modifying both OSD and MDS maps in one > command. > > Cheers, > John > > 1. http://tracker.ceph.com/issues/8010 > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on