From owner-freebsd-hackers@FreeBSD.ORG Fri Dec 28 00:37:18 2007 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 64F0516A417 for ; Fri, 28 Dec 2007 00:37:18 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (cl-162.ewr-01.us.sixxs.net [IPv6:2001:4830:1200:a1::2]) by mx1.freebsd.org (Postfix) with ESMTP id E81D413C455 for ; Fri, 28 Dec 2007 00:37:17 +0000 (UTC) (envelope-from brooks@lor.one-eyed-alien.net) Received: from lor.one-eyed-alien.net (localhost [127.0.0.1]) by lor.one-eyed-alien.net (8.14.1/8.13.8) with ESMTP id lBS0bGBQ049615; Thu, 27 Dec 2007 18:37:16 -0600 (CST) (envelope-from brooks@lor.one-eyed-alien.net) Received: (from brooks@localhost) by lor.one-eyed-alien.net (8.14.1/8.13.8/Submit) id lBS0bGxA049614; Thu, 27 Dec 2007 18:37:16 -0600 (CST) (envelope-from brooks) Date: Thu, 27 Dec 2007 18:37:16 -0600 From: Brooks Davis To: Garrett Cooper Message-ID: <20071228003716.GB48997@lor.one-eyed-alien.net> References: <5950EE0C-383D-4D6B-9991-A0DEABD2ADE4@u.washington.edu> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="xgyAXRrhYN0wYx8y" Content-Disposition: inline In-Reply-To: <5950EE0C-383D-4D6B-9991-A0DEABD2ADE4@u.washington.edu> User-Agent: Mutt/1.5.16 (2007-06-09) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (lor.one-eyed-alien.net [127.0.0.1]); Thu, 27 Dec 2007 18:37:17 -0600 (CST) Cc: hackers@freebsd.org Subject: Re: BSD license compatible hash algorithm? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Dec 2007 00:37:18 -0000 --xgyAXRrhYN0wYx8y Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Dec 27, 2007 at 04:30:40PM -0800, Garrett Cooper wrote: > Hi all, > Just wondering if anyone knew of a good BSD license compatible key-based= =20 > hash placement / retrieval algorithm that was available anywhere. > I'm looking for a reliable way to lookup objects to see if a given actio= n=20 > would be performed in my revised pkg_install(1), to thus efficiently=20 > pre-plan out the installation dependencies and fully utilize=20 > multiprocessing capabilities of contemporary machines / eliminate duplica= te=20 > dependency install requirements. > I know I can use tree structures or hash(3), but I want to avoid trees= =20 > (inefficient with large data sets of course) and I was looking for a=20 > non-BDB based solution (for right now, with this given structure as I don= 't=20 > want to write everything to disk). Later on it might be a good idea to=20 > cache the results using BDB on disk, but for now I was just wondering if= =20 > there were any non-BDB based hashing solutions that anyone knew of. We imported hash(9) from Open/NetBSD recently. It may do what you want. -- Brooks --xgyAXRrhYN0wYx8y Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFHdEU8XY6L6fI4GtQRAilmAJ9mbjJgZmJpLGk17hc3/DmAZWg6PQCeObve ygN5Lg80WUDSPFuIeg9j0yM= =nvmQ -----END PGP SIGNATURE----- --xgyAXRrhYN0wYx8y--