Date: 21 Jun 2001 12:34:00 +0200 From: Dag-Erling Smorgrav <des@ofug.org> To: Stefan Parvu <sparvu@cc.hut.fi> Cc: fs@FreeBSD.ORG Subject: Re: softupdates questions Message-ID: <xzphexayvdz.fsf@flood.ping.uio.no> In-Reply-To: <Pine.OSF.4.10.10106211141420.27742-100000@alpha.hut.fi> References: <Pine.OSF.4.10.10106211141420.27742-100000@alpha.hut.fi>
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Stefan Parvu <sparvu@cc.hut.fi> 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
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