From owner-freebsd-stable Mon Nov 12 6:27:32 2001 Delivered-To: freebsd-stable@freebsd.org Received: from mailout1.informatik.tu-muenchen.de (mailout1.informatik.tu-muenchen.de [131.159.254.5]) by hub.freebsd.org (Postfix) with ESMTP id 85C9B37B419 for ; Mon, 12 Nov 2001 06:27:28 -0800 (PST) Received: from tuminfo2.informatik.tu-muenchen.de (tuminfo2.informatik.tu-muenchen.de [131.159.0.81]) by mailout1.informatik.tu-muenchen.de (Postfix) with ESMTP id 8F4147953 for ; Mon, 12 Nov 2001 15:27:27 +0100 (MET) Received: from atrbg11.informatik.tu-muenchen.de (atrbg11.informatik.tu-muenchen.de [131.159.24.91]) by tuminfo2.informatik.tu-muenchen.de (Postfix) with ESMTP id D658510AC1 for ; Mon, 12 Nov 2001 15:27:23 +0100 (MET) Received: by atrbg11.informatik.tu-muenchen.de (Postfix, from userid 20455) id 0D9E4136DB; Mon, 12 Nov 2001 15:27:26 +0100 (CET) Date: Mon, 12 Nov 2001 15:27:26 +0100 From: Daniel Lang To: freebsd-stable@freebsd.org Subject: dirpref benefit on virtual disks Message-ID: <20011112152726.A10505@atrbg11.informatik.tu-muenchen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i X-Geek: GCS/CC d-- s: a- C++$ UBS++++$ P+++$ L- E-(---) W+++(--) N++ o K w--- O? M? V? PS+(++) PE--(+) Y+ PGP+ t++ 5+++ X R+(-) tv+ b+ DI++ D++ G++ e+++ h---(-) r++>+++ y+ Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi, as I understood, the new dirpref algorithm can improve performance a lot, but only applies to new created directories. To be able to use it, old existing directories would have to be created new. Now I have some huge filesystems on RAID partitions. To recreate all their directories involves some hassle, but I would think about doing it. But since these are no real but virtual disks, spread over a set of disks in a hardware raidbox, I'm not sure, if I would even benefit from the better algorithm. It sounded a bit like designed for filesystems on a (single?) disk? Could anyone clearify this, please? Also I would like to know, if there is a certain limit of free space, on the disk, so that the algorithm can actually use the better layout? The disks have some space left, in an absolute way, but not that much from a relative point of view (like 12GB left which is just 6% minfree not taken into account). Thanks for your answers. Best regards, Daniel -- IRCnet: Mr-Spock - Burn them to ashes, then burn the ashes. - *Daniel Lang * dl@leo.org * +49 89 289 25735 * http://www.leo.org/~dl/* To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message