From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:60825 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751363Ab3EIG4b (ORCPT ); Thu, 9 May 2013 02:56:31 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1UaKmE-0005Mb-3W for linux-btrfs@vger.kernel.org; Thu, 09 May 2013 08:56:30 +0200 Received: from 50-0-67-239.dsl.static.fusionbroadband.com ([50.0.67.239]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 09 May 2013 08:56:30 +0200 Received: from rogerb by 50-0-67-239.dsl.static.fusionbroadband.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 09 May 2013 08:56:30 +0200 To: linux-btrfs@vger.kernel.org From: Roger Binns Subject: Re: [RFC 0/5] BTRFS hot relocation support Date: Wed, 08 May 2013 23:56:18 -0700 Message-ID: References: <1367830418-26865-1-git-send-email-zwu.kernel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 In-Reply-To: Sender: linux-btrfs-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/05/13 16:13, Zhi Yong Wu wrote: > i want to know if btrfs hot relocation support is still meanful It is to me. The problem with bcache is that it is a cache. ie if you have a 256GB SSD and a 500GB HDD then you'll have total storage of 500GB. Hot relocation was described as having 750GB available in the same scenario. I'd also expect btrfs level support to be more friendly such as being able to mount -o degraded if one of the devices is missing. Roger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlGLSIkACgkQmOOfHg372QSHQACeLwbhnVsH7+/6ZSIaGAcMUyBe gPwAoNAKBAFB65XZQbLyxyCJPHODR+9z =6OXt -----END PGP SIGNATURE-----