From: Roman Mamedov Subject: Re: Filesystem writes on RAID5 too slow Date: Tue, 19 Nov 2013 01:25:36 +0600 Message-ID: <20131119012536.473bf37b@natsu> References: <20131119004140.3fea96df@natsu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/zJADM7HgRyYwXL4UQY8zh=N"; protocol="application/pgp-signature" Cc: "Kernel.org-Linux-RAID" , "Kernel.org-Linux-XFS" , "Kernel.org-Linux-EXT4" To: Martin Boutin Return-path: Received: from len.romanrm.net ([91.229.20.24]:46605 "EHLO len.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751959Ab3KRTZn (ORCPT ); Mon, 18 Nov 2013 14:25:43 -0500 In-Reply-To: <20131119004140.3fea96df@natsu> Sender: linux-ext4-owner@vger.kernel.org List-ID: --Sig_/zJADM7HgRyYwXL4UQY8zh=N Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 19 Nov 2013 00:41:40 +0600 Roman Mamedov wrote: > > The command line for measuring filesystem read and write speeds was: > >=20 > > $ dd if=3D/tmp/diskmnt/filerd.zero of=3D/dev/null bs=3D1M count=3D1000 = iflag=3Ddirect > > $ dd if=3D/dev/zero of=3D/tmp/diskmnt/filewr.zero bs=3D1M count=3D1000 = oflag=3Ddirect >=20 > Try testing with "fdatasync" instead of "direct" here. Sorry, "conv=3Dfdatasync" instead of "oflag=3Ddirect". --=20 With respect, Roman --Sig_/zJADM7HgRyYwXL4UQY8zh=N Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlKKabAACgkQTLKSvz+PZwgoPgCfRGrUCd59bvnmF2xxIL6/wWfJ /DoAn0+AZJ6y6v3sZvsSH0222y+5yhkp =OFIi -----END PGP SIGNATURE----- --Sig_/zJADM7HgRyYwXL4UQY8zh=N--