From: Mark Walters Date: Mon, 2 Jun 2014 14:10:30 +0000 (+0100) Subject: Re: Deduplication ? X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=1648613d1efc7eafd488a9297ac22f42e702e9ec;p=notmuch-archives.git Re: Deduplication ? --- diff --git a/15/8be61ed4bcbaa6841092ef1330fdcea8db92fd b/15/8be61ed4bcbaa6841092ef1330fdcea8db92fd new file mode 100644 index 000000000..23305a464 --- /dev/null +++ b/15/8be61ed4bcbaa6841092ef1330fdcea8db92fd @@ -0,0 +1,119 @@ +Return-Path: +X-Original-To: notmuch@notmuchmail.org +Delivered-To: notmuch@notmuchmail.org +Received: from localhost (localhost [127.0.0.1]) + by olra.theworths.org (Postfix) with ESMTP id 18B4E431FAF + for ; Mon, 2 Jun 2014 07:10:41 -0700 (PDT) +X-Virus-Scanned: Debian amavisd-new at olra.theworths.org +X-Spam-Flag: NO +X-Spam-Score: 0.502 +X-Spam-Level: +X-Spam-Status: No, score=0.502 tagged_above=-999 required=5 + tests=[DKIM_ADSP_CUSTOM_MED=0.001, FREEMAIL_FROM=0.001, + NML_ADSP_CUSTOM_MED=1.2, RCVD_IN_DNSWL_LOW=-0.7] autolearn=disabled +Received: from olra.theworths.org ([127.0.0.1]) + by localhost (olra.theworths.org [127.0.0.1]) (amavisd-new, port 10024) + with ESMTP id t2db5YChqkBC for ; + Mon, 2 Jun 2014 07:10:33 -0700 (PDT) +Received: from mail2.qmul.ac.uk (mail2.qmul.ac.uk [138.37.6.6]) + (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) + (No client certificate requested) + by olra.theworths.org (Postfix) with ESMTPS id F2645431FAE + for ; Mon, 2 Jun 2014 07:10:32 -0700 (PDT) +Received: from smtp.qmul.ac.uk ([138.37.6.40]) + by mail2.qmul.ac.uk with esmtp (Exim 4.71) + (envelope-from ) + id 1WrSwZ-00013N-5e; Mon, 02 Jun 2014 15:10:31 +0100 +Received: from 5751dfa2.skybroadband.com ([87.81.223.162] helo=localhost) + by smtp.qmul.ac.uk with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.71) + (envelope-from ) + id 1WrSwY-0001Yg-Rf; Mon, 02 Jun 2014 15:10:30 +0100 +From: Mark Walters +To: Vladimir Marek , + David Edmondson +Subject: Re: Deduplication ? +In-Reply-To: <20140602135438.GA8223@virt.cz.oracle.com> +References: <20140602123212.GA12639@virt.cz.oracle.com> + + <20140602135438.GA8223@virt.cz.oracle.com> +User-Agent: Notmuch/0.15.2+615~g78e3a93 (http://notmuchmail.org) Emacs/23.4.1 + (i486-pc-linux-gnu) +Date: Mon, 02 Jun 2014 15:10:30 +0100 +Message-ID: <871tv7s8q1.fsf@qmul.ac.uk> +MIME-Version: 1.0 +Content-Type: text/plain; charset=us-ascii +X-Sender-Host-Address: 87.81.223.162 +X-QM-Geographic: According to ripencc, + this message was delivered by a machine in Britain (UK) (GB). +X-QM-SPAM-Info: Sender has good ham record. :) +X-QM-Body-MD5: f411ff153fb12459d0d92579f3c5f13a (of first 20000 bytes) +X-SpamAssassin-Score: -0.1 +X-SpamAssassin-SpamBar: / +X-SpamAssassin-Report: The QM spam filters have analysed this message to + determine if it is + spam. We require at least 5.0 points to mark a message as spam. + This message scored -0.1 points. + Summary of the scoring: + * 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail + provider * (markwalters1009[at]gmail.com) + * -0.1 AWL AWL: From: address is in the auto white-list +X-QM-Scan-Virus: ClamAV says the message is clean +Cc: notmuch@notmuchmail.org +X-BeenThere: notmuch@notmuchmail.org +X-Mailman-Version: 2.1.13 +Precedence: list +List-Id: "Use and development of the notmuch mail system." + +List-Unsubscribe: , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: , + +X-List-Received-Date: Mon, 02 Jun 2014 14:10:41 -0000 + + +Vladimir Marek writes: + +>> > I want to import bigger chunk of archived messages into my notmuch +>> > database. It's about 100k messages. The problem is, that I most probably +>> > have quite a lot of those messages in the DB. Basically I would like to +>> > add only those I don't have already. +>> > +>> > There are two possibilities +>> > +>> > a) I will add all the 100k messages and then remove the duplicities. +>> > +>> > b) I will write a script which will parse the message ID's of the +>> > to-be-added messages and try to match them to the notmuch DB. Adding +>> > only files I can't find already. +>> > +>> > Ad b) might be better option, but I started to play with the idea of +>> > deduplication. I'm thinking about listing all the message IDs stored in +>> > DB, listing all files belonging to the IDs and deleting all but one. +>> > Also I'm thinking about implementing some simple algorithm telling me +>> > whether the messages are really very similar. Just to be sure I don't +>> > delete something I don't want to. +>> > +>> > Was anyone playing with the idea? +>> +>> notsync[1] used the (lack of) existence of a message id in the store to +>> decide whether to add something from an IMAP server, but it is old, +>> crufty, unused and unloved code. +> +> I see, that's close to my b) solution, thanks! + +Did you mean a) here? The idea was to add them all first and then run +this script to delete the duplicates. + +Best wishes + +Mark + +> -- +> Vlad +> _______________________________________________ +> notmuch mailing list +> notmuch@notmuchmail.org +> http://notmuchmail.org/mailman/listinfo/notmuch