From owner-freebsd-hackers Sun Jun 18 11:34:18 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id LAA25767 for hackers-outgoing; Sun, 18 Jun 1995 11:34:18 -0700 Received: from ibp.ibp.fr (ibp.ibp.fr [132.227.60.30]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id LAA25761 for ; Sun, 18 Jun 1995 11:34:16 -0700 Received: from blaise.ibp.fr (blaise.ibp.fr [132.227.60.1]) by ibp.ibp.fr (8.6.12/jtpda-5.0) with ESMTP id UAA18253 ; Sun, 18 Jun 1995 20:34:09 +0200 Received: from (roberto@localhost) by blaise.ibp.fr (8.6.12/jtpda-5.0) id UAA14935 ; Sun, 18 Jun 1995 20:34:08 +0200 From: roberto@blaise.ibp.fr (Ollivier Robert) Message-Id: <199506181834.UAA14935@blaise.ibp.fr> Subject: Re: How does the disk IO clustering work? To: peter@haywire.DIALix.COM (Peter Wemm) Date: Sun, 18 Jun 1995 20:34:08 +0200 (MET DST) Cc: hackers@freebsd.org In-Reply-To: from "Peter Wemm" at Jun 19, 95 02:22:59 am X-Operating-System: FreeBSD BUILT-19950501 ctm#617 X-Mailer: ELM [version 2.4 PL24] Content-Type: text Content-Length: 591 Sender: hackers-owner@freebsd.org Precedence: bulk > > jhome # tunefs -p /dev/rsd0h > tunefs: maximum contiguous block count: (-a) 1 You can push this to 8 > tunefs: rotational delay between contiguous blocks: (-d) 4 ms You should lower this to 0. > tunefs: maximum blocks per file in a cylinder group: (-e) 1024 > tunefs: minimum percentage of free space: (-m) 10% Now the default is 8%. There is another parameter that can be set only at newfs time : -n 1 -- Ollivier ROBERT -=- The daemon is FREE! -=- roberto@FreeBSD.ORG FreeBSD keltia 2.0-BUILT-19950503 #3: Wed May 3 19:53:04 MET DST 1995