From owner-freebsd-stable Sun Sep 30 8:51: 4 2001 Delivered-To: freebsd-stable@freebsd.org Received: from point.osg.gov.bc.ca (point.osg.gov.bc.ca [142.32.102.44]) by hub.freebsd.org (Postfix) with ESMTP id E5A7B37B409 for ; Sun, 30 Sep 2001 08:51:00 -0700 (PDT) Received: (from daemon@localhost) by point.osg.gov.bc.ca (8.8.7/8.8.8) id IAA13835; Sun, 30 Sep 2001 08:50:45 -0700 Received: from passer.osg.gov.bc.ca(142.32.110.29) via SMTP by point.osg.gov.bc.ca, id smtpda13833; Sun Sep 30 08:50:43 2001 Received: (from uucp@localhost) by passer.osg.gov.bc.ca (8.11.6/8.9.1) id f8UFof605052; Sun, 30 Sep 2001 08:50:41 -0700 (PDT) Received: from UNKNOWN(10.1.2.1), claiming to be "cwsys.cwsent.com" via SMTP by passer9.cwsent.com, id smtpdaf5050; Sun Sep 30 08:50:17 2001 Received: (from smtpd@localhost) by cwsys.cwsent.com (8.11.6/8.9.1) id f8UFoEG02214; Sun, 30 Sep 2001 08:50:14 -0700 (PDT) Message-Id: <200109301550.f8UFoEG02214@cwsys.cwsent.com> X-Authentication-Warning: cwsys.cwsent.com: smtpd set sender to using -f Received: from localhost.cwsent.com(127.0.0.1), claiming to be "cwsys" via SMTP by localhost.cwsent.com, id smtpdNK2203; Sun Sep 30 08:49:48 2001 X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 Reply-To: Cy Schubert - ITSD Open Systems Group From: Cy Schubert - ITSD Open Systems Group X-Sender: schubert To: Mike Harding Cc: admin@rshb.com.ru, stable@FreeBSD.ORG Subject: Re: dirpref gives massive performance boost In-reply-to: Your message of "Sun, 30 Sep 2001 08:24:04 PDT." <20010930152404.581A8133C1@netcom1.netcom.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Sun, 30 Sep 2001 08:49:47 -0700 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 In message <20010930152404.581A8133C1@netcom1.netcom.com>, Mike Harding writes: > > Um - what about my question? Is the newfs necessary? Repartitioning, > backup, and restore also require a backup medium, etc. The more of your filesystem that has had its files allocated using the new dirpref, the greater the benefit. There was a comment made earlier in another thread on another list (see archives) that the new dirpref has the risk of greater fragmentation. There were no responses to the comment. I'm not sure whether this is just a concern someone had or whether the risk is real. The fact that there were no replies to that comment seems to indicate we just don't know yet. In some OpenBSD mailing list archives (search Google) there were comments about dirpref + softupdates being 60x faster than UFS without the two features. Regards, Phone: (250)387-8437 Cy Schubert Fax: (250)387-5766 Team Leader, Sun/Alpha Team Internet: Cy.Schubert@osg.gov.bc.ca Open Systems Group, ITSD Ministry of Management Services Province of BC To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message