From: Richard Weinberger Subject: Re: planning general storage capacity for y fs Date: Mon, 27 Apr 2015 10:06:22 +0200 Message-ID: <553DEDFE.2000700@nod.at> References: <006901d08012$3a1f97a0$ae5ec6e0$@codeaurora.org> <007201d080bf$96a0e4e0$c3e2aea0$@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Cc: linux-mtd@lists.infradead.org, linux-ext4@vger.kernel.org, 'Tanya Brokhman' To: Dolev Raviv Return-path: Received: from a.ns.miles-group.at ([95.130.255.143]:65275 "EHLO radon.swed.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751384AbbD0IGZ (ORCPT ); Mon, 27 Apr 2015 04:06:25 -0400 In-Reply-To: <007201d080bf$96a0e4e0$c3e2aea0$@codeaurora.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: Am 27.04.2015 um 09:55 schrieb Dolev Raviv: > Thanks Richard! > Let me rephrase the question: In the past I knew there was a rule of thumb, 'leave free 30% of the storage space'. Nowadays I couldn't find any reference to this. Most likely because this is and was always kind of superstition. ;) An almost full filesystems has to do more to find free space, but I don't dare to give rules of thumb. > I was wondering, is there a known point in UBIFS (or ext4), where leaving less free storage space, that performance is dropping? Maybe a ratio of free-occupied is not the right way to look at it, but to leave a certain size free (e.g. 50MB)? I don't think so. Maybe Ted can give you more details on ext4. For UBIFS I'd say, figure yourself. i.e. run benchmarks... Thanks, //richard