From: Pavel Machek Subject: Re: bcache with existing ext4 filesystem Date: Mon, 24 Jul 2017 21:15:48 +0200 Message-ID: <20170724191548.GA32425@amd> References: <20170724185703.GA31422@amd> <64c810cf-a95c-f862-f25a-ebd7419b2632@thelounge.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="lrZ03NoBR/3+SXJZ" Cc: linux-ext4@vger.kernel.org, kernel list , tytso@mit.edu, kent.overstreet@gmail.com, linux-bcache@vger.kernel.org To: Reindl Harald Return-path: Content-Disposition: inline In-Reply-To: <64c810cf-a95c-f862-f25a-ebd7419b2632@thelounge.net> Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org --lrZ03NoBR/3+SXJZ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon 2017-07-24 21:08:16, Reindl Harald wrote: >=20 >=20 > Am 24.07.2017 um 20:57 schrieb Pavel Machek: > >Would it be feasible to run bcache (write-through) with existing ext4 > >filesystem? > > > >I have 400GB of data I'd rather not move, and SSD I could use for > >caching. Ok, SSD is connecte over USB2, but I guess it is still way > >faster then seeking harddrive on random access >=20 > i doubt that seriously - USB2 has a terrible latency Well.. if that's too slow, I can get SSD M.2; plus bcache docs says that combination works. And... if you ever tried to do git diff while git checkout is running on spinning rust... spinning rust has awful parameters when idle, and it only gets worse when loaded :-(. =09 Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --lrZ03NoBR/3+SXJZ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAll2R2QACgkQMOfwapXb+vL9PwCfRMP3k/4KHRZEMQVHNHM0BIjB DFIAmwdUjEpgcSn1tAPb61HHBM9IBAuJ =7786 -----END PGP SIGNATURE----- --lrZ03NoBR/3+SXJZ--