From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:42629 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753972AbeFUTPh (ORCPT ); Thu, 21 Jun 2018 15:15:37 -0400 Date: Thu, 21 Jun 2018 21:15:35 +0200 From: "Luis R. Rodriguez" Subject: Re: Mounting xfs filesystem takes long time Message-ID: <20180621191535.GI7508@wotan.suse.de> References: <2a9a023d-fa37-59dc-caf2-c7c4167d3c75@levigo.de> <20180619161819.GD21698@magnolia> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: Eric Sandeen Cc: "Darrick J. Wong" , "swadmin - levigo.de" , linux-xfs@vger.kernel.org On Tue, Jun 19, 2018 at 02:21:15PM -0500, Eric Sandeen wrote: > On 6/19/18 11:18 AM, Darrick J. Wong wrote: > > On Tue, Jun 19, 2018 at 02:27:29PM +0200, swadmin - levigo.de wrote: > >> Hi @all > >> I have a problem with mounting a large XFS filesystem which takes about > >> 8-10 minutes. > >> > >> > >> > >> :~# df -h /graylog_data > >> Filesystem Size Used Avail Use% Mounted on > >> /dev/mapper/vgdata-graylog_data 11T 5.0T 5.1T 50% /graylog_data > >> > >> ---- > >> > >> :~# xfs_info /dev/mapper/vgdata-graylog_data > >> meta-data=/dev/mapper/vgdata-graylog_data isize=512 agcount=40805, > >> agsize=65792 blks > > > > 41,000 AGs is a lot of metadata to load. Did someone growfs a 1G fs > > into a 11T fs? > > > > Let me state that a little more clearly: this is a badly mis-administered > filesystem; 40805 x 256MB AGs is nearly unusable, as you've seen. > > If at all possible I would start over with a rationally-created filesystem > and migrate the data. Considering *a lot* of folks may typically follow the above "trap", wouldn't it be wise for userspace to complain or warn when the user may want to do something stupid like this? Otherwise I cannot see how we could possibly conceive that this is badly administered filesystem. Luis