From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kara Subject: Re: On the 16TiB max file size limit (not filesystem limit) Date: Tue, 20 Aug 2013 19:35:37 +0200 Message-ID: <20130820173537.GA5030@quack.suse.cz> References: <521135ED.6010101@shiftmail.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Spelic Return-path: Received: from cantor2.suse.de ([195.135.220.15]:56664 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752288Ab3HUHsZ (ORCPT ); Wed, 21 Aug 2013 03:48:25 -0400 Content-Disposition: inline In-Reply-To: <521135ED.6010101@shiftmail.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sun 18-08-13 23:00:29, Spelic wrote: > Dear ext4 developers > are there any plans to overcome the 16TiB maximum file size limit for ext4? > > Now that resize works across 16TiB boundary, many people could be > interested in using ext4 as a slower but safer alternative to a > distributed filesystem for large storages. However 16TiB filesize > limit might be a problem if one wants to do big virtualization or > anyway somehow nesting storage systems one into the other. Is the > limit hard to fix? It would mean an incompatible on disk format change in the format of extent. So it's doable but definitely not trivial. Honza -- Jan Kara SUSE Labs, CR