From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qy0-f187.google.com ([209.85.221.187]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1Ml3SJ-0005qP-Cd for linux-mtd@lists.infradead.org; Tue, 08 Sep 2009 16:22:11 +0000 Received: by qyk17 with SMTP id 17so1430522qyk.2 for ; Tue, 08 Sep 2009 09:22:05 -0700 (PDT) Message-ID: <4AA684A6.1000303@billgatliff.com> Date: Tue, 08 Sep 2009 11:21:58 -0500 From: Bill Gatliff MIME-Version: 1.0 To: Justin Treon Subject: Re: Ideal NAND flashes for JFFS2 or YAFFS References: <774508.54364.qm@web110103.mail.gq1.yahoo.com> In-Reply-To: <774508.54364.qm@web110103.mail.gq1.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-mtd@lists.infradead.org, Joakim Tjernlund , Artem Bityutskiy List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Justin Treon wrote: > For NAND I think there is a simple flow chart to pick your filing system. > > Do you have a partition bigger than 256 MBytes? > If YES: Use UBIFS (@128 MB you can argue the point) > If NO: Do you have a LOT of RAM? > If YES: Use YAFFS2 (It is fast, but RAM hungry) > If NO: Use JFFS2 > With 128MB and/or 1GB partitions, does YAFFS2 use more memory than UBIFS? It does seem to me that YAFFS2 mounts a tad faster, though I haven't broken out the stopwatch or anything (yet). b.g. -- Bill Gatliff bgat@billgatliff.com