From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: O_DIRECT to md raid 6 is slow Date: Thu, 16 Aug 2012 12:41:12 +0600 Message-ID: <20120816124112.2aa22f3e@natsu> References: <502B8D1F.7030706@anonymous.org.uk> <502C1C01.1040509@hardwarefreak.com> <502C35D4.6010804@hardwarefreak.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/dsaBPJ6pCsVYX..ZlCWOvbw"; protocol="application/pgp-signature" Return-path: In-Reply-To: <502C35D4.6010804@hardwarefreak.com> Sender: linux-raid-owner@vger.kernel.org To: stan@hardwarefreak.com Cc: Andy Lutomirski , John Robinson , linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/dsaBPJ6pCsVYX..ZlCWOvbw Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 15 Aug 2012 18:50:44 -0500 Stan Hoeppner wrote: > TTBOMK there are two, and only two, COW filesystems in existence: ZFS an= d BTRFS. There is also NILFS2: http://www.nilfs.org/en/ And in general, any https://en.wikipedia.org/wiki/Log-structured_file_system is COW by design, but afaik of those only NILFS is also in the mainline Lin= ux kernel AND is not aimed just for some niche like flash-based devices, but f= or general-purpose usage. --=20 With respect, Roman ~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Stallman had a printer, with code he could not see. So he began to tinker, and set the software free." --Sig_/dsaBPJ6pCsVYX..ZlCWOvbw Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlAslggACgkQTLKSvz+PZwiUDQCffW5wJIP9cYRu0oiPxqXZ1jFN fFoAoI8UZ1/wjlomjZNBSqxBp0c/fMps =9b02 -----END PGP SIGNATURE----- --Sig_/dsaBPJ6pCsVYX..ZlCWOvbw--