From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: SSD + Rust as raid1 Date: Fri, 31 May 2013 13:54:34 +0600 Message-ID: <20130531135434.5b6bdddb@natsu> References: <51A7C36F.4030605@timedicer.co.uk> <20130531133018.77cd9285@natsu> <51A85574.8080709@timedicer.co.uk> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/Gy5ynqw/mXM2fzJP1XXV4aA"; protocol="application/pgp-signature" Return-path: In-Reply-To: <51A85574.8080709@timedicer.co.uk> Sender: linux-raid-owner@vger.kernel.org To: Dominic Raferd Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/Gy5ynqw/mXM2fzJP1XXV4aA Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Fri, 31 May 2013 08:47:00 +0100 Dominic Raferd wrote: > This is my idea too (see my OP), but I am concerned about optimisation=20 > (--write-behind, --bitmap and --bitmap-chunk settings) especially for=20 > writes. > --write-behind=3D16384 I think this will not work, you will have to use 16383. > --bitmap=3D/mnt/sda1/write-intent-bitmap.file=20 Save yourself lots of maintenance headache, just use --bitmap=3Dinternal > --bitmap-chunk=3D256M Looks OK. --=20 With respect, Roman --Sig_/Gy5ynqw/mXM2fzJP1XXV4aA Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlGoVzoACgkQTLKSvz+PZwivxwCbB+4ZaMR0/WbgOwTq0nucnSPS k5EAn0Fb2vWtFElshCnzdpMOZJ8wJYy6 =ehcv -----END PGP SIGNATURE----- --Sig_/Gy5ynqw/mXM2fzJP1XXV4aA--