From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1P3mrT-0008CU-2A for garchives@archives.gentoo.org; Thu, 07 Oct 2010 09:34:03 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 9CCB6E07DF; Thu, 7 Oct 2010 09:33:32 +0000 (UTC) Received: from mx01.admin-box.com (mx01.admin-box.com [78.47.249.108]) by pigeon.gentoo.org (Postfix) with ESMTP id 4273DE07DF for ; Thu, 7 Oct 2010 09:33:32 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mx01.admin-box.com (Postfix) with ESMTP id 990E134A6174 for ; Thu, 7 Oct 2010 11:33:31 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mx01.admin-box.com Received: from mx01.admin-box.com ([127.0.0.1]) by localhost (mx01.admin-box.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Y8I5RRRcPVpN for ; Thu, 7 Oct 2010 11:33:29 +0200 (CEST) Received: from [172.16.0.58] (delaram.flp.tu-berlin.de [130.149.113.6]) (Authenticated sender: daniel@troeder.de) by mx01.admin-box.com (Postfix) with ESMTPSA id 9B53D34A6170 for ; Thu, 7 Oct 2010 11:33:29 +0200 (CEST) Message-ID: <4CAD93E9.7010100@admin-box.com> Date: Thu, 07 Oct 2010 11:33:29 +0200 From: Daniel Troeder User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100929 Thunderbird/3.1.4 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: Normal disk speed? References: <201009301853.28825.volkerarmin@googlemail.com> <4CA5A440.80601@admin-box.com> <4CA76BF0.8040800@admin-box.com> <4CACC555.309@admin-box.com> In-Reply-To: X-Enigmail-Version: 1.1.2 OpenPGP: id=BB9D4887; url=http://pgpkeys.pca.dfn.de/pks/lookup?search=0xBB9D4887&op=get Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig2E2107EA893C6CE48FF255EE" X-Archives-Salt: 2b8f8113-fcff-45ac-9db3-361db29a1b1e X-Archives-Hash: 00dd46da06f1ac0ea7f70d36c3a75534 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig2E2107EA893C6CE48FF255EE Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 10/07/2010 12:59 AM, Adam Carter wrote: > WOW! Those differences are crazy! >=20 >=20 > Please - I know benchmarking takes a lot of time - but could you ch= eck > something: the behavior those fs have at what time they flush data = from > cache to disk is very different. Have you made sure that you measur= ed > the time it really needs? I mean the difference between: >=20 > $ sync; time cp source dest > and > $ sync; time (cp source dest; sync) >=20 > Only the last measures somewhat correctly. >=20 >=20 > I had noticed that there was, say, 5 seconds of disk activity after the= > cp command complete which I assumed was buffers getting flushed, but 5 > seconds didnt seem that significant overall. I will run the tests as yo= u > suggest and post back. Do you think btrfs (with or without compression)= > would be faster than reiser? If so I will try that as well. On my system it is twice as fast as reiser3 for _lots_ (200.000) of small files with compression on (didn't test is without compression). I didn't test if with big files. But your results may vary anyway. For example btrfs is very cpu-intensive (even more with compression). If you've got a slow cpu (like in embedded devices), jfs might perform better. BTW: _all_ my partitions are encrypted and on LVM, so your use case is probably very different :) Bye, Daniel --=20 PGP key @ http://pgpkeys.pca.dfn.de/pks/lookup?search=3D0xBB9D4887&op=3Dg= et # gpg --recv-keys --keyserver hkp://subkeys.pgp.net 0xBB9D4887 --------------enig2E2107EA893C6CE48FF255EE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkytk+kACgkQg3+4tbudSIdhEwCgn2olVx3Vcm6FRMtkdIZUhIhI cxYAnizAm/7eCZu3hUQQLdDGec+gstcA =luXJ -----END PGP SIGNATURE----- --------------enig2E2107EA893C6CE48FF255EE--