From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josef Bacik Subject: Re: [PATCH] Btrfs-progs: add support for mixed data+metadata block groups V3 Date: Thu, 28 Oct 2010 21:03:08 -0400 Message-ID: <20101029010308.GC11684@dhcp231-156.rdu.redhat.com> References: <1288204654-2127-1-git-send-email-josef@redhat.com> <20101029012013.68a18b8a.ctpm@ist.utl.pt> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: Josef Bacik , linux-btrfs@vger.kernel.org To: =?iso-8859-1?Q?Cl=E1udio?= Martins Return-path: In-Reply-To: <20101029012013.68a18b8a.ctpm@ist.utl.pt> List-ID: On Fri, Oct 29, 2010 at 01:20:13AM +0100, Cl=E1udio Martins wrote: >=20 > On Wed, 27 Oct 2010 14:37:34 -0400 Josef Bacik wro= te: > > So alot of crazy people (I'm looking at you Meego) want to use btrf= s on phones > > and such with small devices. Unfortunately the way we split out me= tadata/data > > chunks it makes space usage inefficient for volumes that are smalle= r than > > 1gigabyte. So add a -M option for mixing metadata+data, and defaul= t to this > > mixed mode if the filesystem is less than or equal to 1 gigabyte. = I've tested > > this with xfstests on a 100mb filesystem and everything is a-ok. > >=20 >=20 > Hi, >=20 > Could you provide some rationale as to why btrfs should support thes= e > two modes of data/metadata (mixed and separate) allocation instead of > just always doing mixed data+metadata? > It makes the volume management stuff easier and gives us more flexibili= ty for how we lay out data and metadata. Thanks, Josef=20 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html