From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mari.romanrm.net ([157.7.203.202]:38399 "EHLO mari.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751676AbaFXLCn (ORCPT ); Tue, 24 Jun 2014 07:02:43 -0400 Date: Tue, 24 Jun 2014 17:02:36 +0600 From: Roman Mamedov To: Gerald Hopf Cc: linux-btrfs@vger.kernel.org Subject: Re: "-d single" for data blocks on a multiple devices doesn't work as it should Message-ID: <20140624170236.28d5bfa9@natsu> In-Reply-To: <53A955F8.8090101@nv-systems.net> References: <53A955F8.8090101@nv-systems.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/yDIsUEa1IbrrnVSsilLxsoI"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/yDIsUEa1IbrrnVSsilLxsoI Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 24 Jun 2014 12:42:00 +0200 Gerald Hopf wrote: > The "-d single" allocator is useless (or broken?). It's just not designed with your use case in mind. It operates on the level= of allocation extents (if I'm not mistaken), not of whole files. If you want to join multiple devices with a per-file granularity (so that a single file is wholely stored on one given device), check out the FUSE filesystem called mhddfs; I wrote an article about it some time ago: https://romanrm.net/mhddfs --=20 With respect, Roman --Sig_/yDIsUEa1IbrrnVSsilLxsoI Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlOpWswACgkQTLKSvz+PZwgiLwCeL3hyHq54Ctb+fR61YFMqL1PC X2sAn0/pjs5vmIj0lBs/q8+/YcW0Lbjb =r1qs -----END PGP SIGNATURE----- --Sig_/yDIsUEa1IbrrnVSsilLxsoI--