From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from len.romanrm.net ([176.31.121.172]:48619 "EHLO len.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422788Ab3CVSMF (ORCPT ); Fri, 22 Mar 2013 14:12:05 -0400 Date: Sat, 23 Mar 2013 00:12:01 +0600 From: Roman Mamedov To: Ask =?UTF-8?B?QmrDuHJu?= Hansen Cc: linux-btrfs@vger.kernel.org Subject: Re: btrfs "stuck" on Message-ID: <20130323001201.2bbbb817@natsu> In-Reply-To: <36071CA2-8A29-4526-8523-7EB40F1C86A6@develooper.com> References: <36071CA2-8A29-4526-8523-7EB40F1C86A6@develooper.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/6etw650yfhaW5NkBaozgSjS"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/6etw650yfhaW5NkBaozgSjS Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Thu, 21 Mar 2013 11:56:37 -0700 Ask Bj=C3=B8rn Hansen wrote: > Hello, >=20 > A few weeks ago I replaced a ZFS backup system with one backed by btrfs. = A script loops over a bunch of hosts rsyncing them to each their own subvol= ume. After each rsync I snapshot the "host-specific" subvolume. >=20 > The "disk" is an iscsi disk that in my benchmarks performs roughly like a= local raid with 2-3 SATA disks. I think you should re-verify if this is still the case. Maybe your block device performance suddenly plummeted for some other unrelated issue? The simplest test would be "hdparm -t /dev/sdc". Personally I use btrfs on top of an MD raid accessed over network via NBD (= and AoE before), without any major issues. Though my workload is perhaps somewh= at lighter than what you describe. --=20 With respect, Roman --Sig_/6etw650yfhaW5NkBaozgSjS Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlFMnvEACgkQTLKSvz+PZwhsuwCeLwUj0CV1inEMODSPc3JhpbZ6 WsgAnAnIbAAqvM6iADiLC2pEmIJZ22Tu =X8+7 -----END PGP SIGNATURE----- --Sig_/6etw650yfhaW5NkBaozgSjS--