From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtpcmd15176.aruba.it ([62.149.156.176]:51181 "EHLO smtpcmd10101.aruba.it" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750772AbdHaKuV (ORCPT ); Thu, 31 Aug 2017 06:50:21 -0400 To: linux-btrfs@vger.kernel.org From: Marco Lorenzo Crociani Subject: mount time for big filesystems Message-ID: <556e7650-8556-d5ca-273e-6c158c1d032e@prismatelecomtesting.com> Date: Thu, 31 Aug 2017 12:43:19 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hi, this 37T filesystem took some times to mount. It has 47 subvolumes/snapshots and is mounted with noatime,compress=zlib,space_cache. Is it normal, due to its size? # time mount /data/R6HW real 1m32.383s user 0m0.000s sys 0m1.348s # time umount /data/R6HW real 0m2.562s user 0m0.000s sys 0m0.466s # df -h /dev/sdo 37T 20T 18T 53% /data/R6HW # btrfs fi df /data/R6HW/ Data, single: total=19.12TiB, used=19.12TiB System, DUP: total=8.00MiB, used=2.05MiB Metadata, DUP: total=37.50GiB, used=36.52GiB GlobalReserve, single: total=512.00MiB, used=0.00B # btrfs device usage /data/R6HW/ /dev/sdo, ID: 1 Device size: 36.38TiB Device slack: 0.00B Data,single: 19.12TiB Metadata,DUP: 75.00GiB System,DUP: 16.00MiB Unallocated: 17.18TiB Regards, -- Marco Crociani