From owner-freebsd-fs Thu Jun 21 3:34: 6 2001 Delivered-To: freebsd-fs@freebsd.org Received: from flood.ping.uio.no (flood.ping.uio.no [129.240.78.31]) by hub.freebsd.org (Postfix) with ESMTP id 4C92537B403 for ; Thu, 21 Jun 2001 03:34:03 -0700 (PDT) (envelope-from des@ofug.org) Received: (from des@localhost) by flood.ping.uio.no (8.9.3/8.9.3) id MAA64206; Thu, 21 Jun 2001 12:34:01 +0200 (CEST) (envelope-from des@ofug.org) X-URL: http://www.ofug.org/~des/ X-Disclaimer: The views expressed in this message do not necessarily coincide with those of any organisation or company with which I am or have been affiliated. To: Stefan Parvu Cc: fs@FreeBSD.ORG Subject: Re: softupdates questions References: From: Dag-Erling Smorgrav Date: 21 Jun 2001 12:34:00 +0200 In-Reply-To: Message-ID: Lines: 32 User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.7 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Stefan Parvu writes: > 1. Why is not recommended to enable softupdates in / slice ? > Do you have any example or some hints here ? Because when you delete a file with soft updates, the space it occupies isn't released immediately, so if your / partition is short on space you may have trouble running 'make installworld'. > 2.dirpref is a module developed by OpenBSD group or it is as default with > softupdates ? The term "dirpref" refers to the algorithm that determines the optimal placement of new directories and files on disk. It's not an add-on module, nor is it specific to the soft updates mechanism - you can't have FFS without some kind of dirpref algorithm. What you're probably thinking of is Grigoriy Orlov's new dirpref algorithm, which is supposed to be 5% to 10% than the old one. I don't know if Grigoriy is an OpenBSD devloper, though OpenBSD integrated his code a few days before we did. Details about the new dirpref code are available in the CVS logs (e.g. rev 1.20 of src/sys/ufs/ffs/fs.h, or CVSROOT/commitlogs/sys.010601.gz) > 3. There is some concern about to integrate dirpref to FreeBSD . Why is > this ? Are any specific changes to fsck or other tools regarding dirpref ? It was integrated in early April. I can't remember there being any controversy over it. DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message