From mboxrd@z Thu Jan 1 00:00:00 1970 From: Edward Shishkin Subject: Re: the " 'official' point of view" expressed by kernelnewbies.org regarding reiser4 inclusion Date: Mon, 07 Aug 2006 02:19:09 +0400 Message-ID: <44D66ADD.6020007@namesys.com> References: <200607312314.37863.bernd-schubert@gmx.de> <200608011428.k71ESIuv007094@laptop13.inf.utfsm.cl> <20060801165234.9448cb6f.reiser4@blinkenlights.ch> <1154446189.15540.43.camel@localhost.localdomain> <44CF9BAD.5020003@emc.com> <44CF3DE0.3010501@namesys.com> <20060803140344.GC7431@merlin.emma.line.org> <44D219F9.9080404@namesys.com> <44D231DF.1080804@namesys.com> <44D37E1B.1040109@namesys.com> <44D3ECB5.1060106@namesys.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: list-help: list-unsubscribe: list-post: Errors-To: flx@namesys.com In-Reply-To: <44D3ECB5.1060106@namesys.com> List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Hans Reiser Cc: Matthias Andree , ric@emc.com, Alan Cox , Adrian Ulrich , "Horst H. von Brand" , bernd-schubert@gmx.de, reiserfs-list@namesys.com, jbglaw@lug-owl.de, clay.barnes@gmail.com, rudy@edsons.demon.nl, ipso@snappymail.ca, lkml@lpbproductions.com, jeff@garzik.org, tytso@mit.edu, linux-kernel@vger.kernel.org Hans Reiser wrote: > Edward Shishkin wrote: > > >>> >>>How about we switch to ecc, which would help with bit rot not sector >>>loss? >> >> >>Interesting aspect. >> >>Yes, we can implement ECC as a special crypto transform that inflates >>data. As I mentioned earlier, it is possible via translation of key >>offsets with scale factor > 1. >> >>Of course, it is better then nothing, but anyway meta-data remains >>ecc-unprotected, and, hence, robustness is not increased.. >> >>Edward. > > > Would you prefer to do it as a node layout plugin instead, so as to get > the metadata? > Yes, it looks like a business of node plugin, but AFAIK, you objected against such checks: currently only bitmap nodes have a protection (checksum); supporting ecc-signatures is more space/cpu expensive. Edward.