From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:44516 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751159AbaLTBjO (ORCPT ); Fri, 19 Dec 2014 20:39:14 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Y290i-0002ov-Aq for linux-btrfs@vger.kernel.org; Sat, 20 Dec 2014 02:39:12 +0100 Received: from ip68-231-22-224.ph.ph.cox.net ([68.231.22.224]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Dec 2014 02:39:12 +0100 Received: from 1i5t5.duncan by ip68-231-22-224.ph.ph.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 20 Dec 2014 02:39:12 +0100 To: linux-btrfs@vger.kernel.org From: Duncan <1i5t5.duncan@cox.net> Subject: Re: btrfs is using 25% more disk than it should Date: Sat, 20 Dec 2014 01:38:55 +0000 (UTC) Message-ID: References: <54949454.9020601@fb.com> <549495D4.9030800@fb.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Josef Bacik posted on Fri, 19 Dec 2014 16:17:08 -0500 as excerpted: > tl;dr: Cow means you can in the worst case end up using 2 * filesize - > blocksize of data on disk and the file will appear to be filesize. Thanks for the tl;dr /and/ the very sensible longer explanation. That's a very nice thing to know and to file away for further reference. =:^) -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman