From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8852AC433F5 for ; Mon, 7 Mar 2022 14:37:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243300AbiCGOiS (ORCPT ); Mon, 7 Mar 2022 09:38:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232619AbiCGOiR (ORCPT ); Mon, 7 Mar 2022 09:38:17 -0500 X-Greylist: delayed 347 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 07 Mar 2022 06:37:23 PST Received: from vps.thesusis.net (vps.thesusis.net [34.202.238.73]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1BCE68F635 for ; Mon, 7 Mar 2022 06:37:23 -0800 (PST) Received: by vps.thesusis.net (Postfix, from userid 1000) id 8F25C7EFC6; Mon, 7 Mar 2022 09:31:35 -0500 (EST) References: User-agent: mu4e 1.7.0; emacs 27.1 From: Phillip Susi To: Jan Ziak <0xe2.0x9a.0x9b@gmail.com> Cc: linux-btrfs@vger.kernel.org Subject: Re: Btrfs autodefrag wrote 5TB in one day to a 0.5TB SSD without a measurable benefit Date: Mon, 07 Mar 2022 09:30:55 -0500 In-reply-to: Message-ID: <87tuc9q1fc.fsf@vps.thesusis.net> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Jan Ziak <0xe2.0x9a.0x9b@gmail.com> writes: > Manual defragmentation decreased the file's size by 7 GB: Eh? How does defragging change a file's size?