From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from postman.teamix.net ([194.150.191.120]:35208 "EHLO rproxy.teamix.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751957Ab3H0N0y convert rfc822-to-8bit (ORCPT ); Tue, 27 Aug 2013 09:26:54 -0400 Received: from zimbra.of.teamix.net (unknown [172.21.242.23]) by rproxy.teamix.net (Postfix) with ESMTP id 85AB87A099 for ; Tue, 27 Aug 2013 15:20:17 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra.of.teamix.net (Postfix) with ESMTP id 66F57123BD5 for ; Tue, 27 Aug 2013 15:20:17 +0200 (CEST) Received: from zimbra.of.teamix.net ([127.0.0.1]) by localhost (zimbra.of.teamix.net [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id Zft7NPVZzoGC for ; Tue, 27 Aug 2013 15:20:16 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra.of.teamix.net (Postfix) with ESMTP id 1232D123BD6 for ; Tue, 27 Aug 2013 15:20:16 +0200 (CEST) Received: from zimbra.of.teamix.net ([127.0.0.1]) by localhost (zimbra.of.teamix.net [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id auh2I3byGjfF for ; Tue, 27 Aug 2013 15:20:15 +0200 (CEST) Received: from zimbra.of.teamix.net (zimbra.of.teamix.net [172.21.242.23]) by zimbra.of.teamix.net (Postfix) with ESMTP id EB39E123BD5 for ; Tue, 27 Aug 2013 15:20:15 +0200 (CEST) Date: Tue, 27 Aug 2013 15:20:15 +0200 (CEST) From: Martin Steigerwald To: linux-btrfs@vger.kernel.org Message-ID: <1865492918.2145268.1377609615453.JavaMail.zimbra@teamix.de> In-Reply-To: <1242390564.2145156.1377608853484.JavaMail.zimbra@teamix.de> Subject: Can BTRFS use Forward Correction Codes? MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hi! I just read http://www.amplidata.com/pdf/The-RAID-Catastrophe.pdf According to that – well marketing white paper – it offers huge advantages over just replicating the data several times. What do you think about it? Can BTRFS use Forward Correction Codes to allow scenarios like 4 out of 12 drives can fail? And can this provide an advantage over regular replication? Ciao, -- Martin Steigerwald - teamix GmbH - http://www.teamix.de gpg: 19E3 8D42 896F D004 08AC A0CA 1E10 C593 0399 AE90