Date: Thu, 27 Dec 2007 16:47:26 -0800 From: Garrett Cooper <youshi10@u.washington.edu> To: Brooks Davis <brooks@freebsd.org> Cc: hackers@freebsd.org Subject: Re: BSD license compatible hash algorithm? Message-ID: <B8D4C3C6-B867-4550-9F17-4DC6930D10E2@u.washington.edu> In-Reply-To: <20071228003716.GB48997@lor.one-eyed-alien.net> References: <5950EE0C-383D-4D6B-9991-A0DEABD2ADE4@u.washington.edu> <20071228003716.GB48997@lor.one-eyed-alien.net>
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On Dec 27, 2007, at 4:37 PM, Brooks Davis wrote: > 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 >> hash placement / retrieval algorithm that was available anywhere. >> I'm looking for a reliable way to lookup objects to see if a >> given action >> would be performed in my revised pkg_install(1), to thus efficiently >> pre-plan out the installation dependencies and fully utilize >> multiprocessing capabilities of contemporary machines / eliminate >> duplicate >> dependency install requirements. >> I know I can use tree structures or hash(3), but I want to avoid >> trees >> (inefficient with large data sets of course) and I was looking for a >> non-BDB based solution (for right now, with this given structure >> as I don't >> want to write everything to disk). Later on it might be a good >> idea to >> cache the results using BDB on disk, but for now I was just >> wondering if >> 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 Brooks, Looks promising, but how difficult would it be to port the code to other platforms (Win32 for instance?). If possible (and this is lower prio because FreeBSD has a lot more apps available as pkgs / ports compared to Win32), I'm looking for a solution that would be easily portable, as I'm trying to effectively kill two birds with one stone by programming an equivalent generalized app / infrastructure for my current job (large scale Windows administration and staying on top of software updates is a pain with and without M$ products), and maybe for open market as well. Thanks, -Garrett
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