From owner-freebsd-current@FreeBSD.ORG Mon Jun 6 23:35:25 2005 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D446B16A41C; Mon, 6 Jun 2005 23:35:25 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from cyrus.watson.org (cyrus.watson.org [204.156.12.53]) by mx1.FreeBSD.org (Postfix) with ESMTP id 81BA643D48; Mon, 6 Jun 2005 23:35:25 +0000 (GMT) (envelope-from rwatson@FreeBSD.org) Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by cyrus.watson.org (Postfix) with ESMTP id 206ED46B2D; Mon, 6 Jun 2005 19:35:25 -0400 (EDT) Date: Tue, 7 Jun 2005 00:36:12 +0100 (BST) From: Robert Watson X-X-Sender: robert@fledge.watson.org To: Jim Rees In-Reply-To: <20050606105100.AFFBA1BBF8@citi.umich.edu> Message-ID: <20050607003532.F42703@fledge.watson.org> References: <20050606105100.AFFBA1BBF8@citi.umich.edu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: current@freebsd.org, fs@freebsd.org Subject: Re: [PATCH] IFS: Inode FileSystem X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Jun 2005 23:35:26 -0000 On Mon, 6 Jun 2005, Jim Rees wrote: > OpenAFS could benefit from something like IFS, although I'm not > volunteering to do the work. The client has complicated code to keep > its thousands of cache files in a hierarchy just to reduce name lookup > time, and the server originally used a special "open by inode" system > call that had been hacked in to the kernel. In Arla, they use the file handle routines, which accomplish some of the same objectives -- insert for a new cache file is still expensive, but you can lookup using the file handle and avoid walking the name space. Robert N M Watson