diff options
Diffstat (limited to 'tickets/8df68737194d4fda872886ac1398485b/Maildir/new/1455999009.M394505P17339Q199.exolobe1')
| -rw-r--r-- | tickets/8df68737194d4fda872886ac1398485b/Maildir/new/1455999009.M394505P17339Q199.exolobe1 | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/tickets/8df68737194d4fda872886ac1398485b/Maildir/new/1455999009.M394505P17339Q199.exolobe1 b/tickets/8df68737194d4fda872886ac1398485b/Maildir/new/1455999009.M394505P17339Q199.exolobe1 new file mode 100644 index 0000000..1c6ce4d --- /dev/null +++ b/tickets/8df68737194d4fda872886ac1398485b/Maildir/new/1455999009.M394505P17339Q199.exolobe1 @@ -0,0 +1,115 @@ +Return-Path: <obnam-dev-bounces@obnam.org> +X-Original-To: distix@pieni.net +Delivered-To: distix@pieni.net +Received: from bagpuss.pepperfish.net (bagpuss.pepperfish.net [148.251.8.16]) + (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) + (No client certificate requested) + by pieni.net (Postfix) with ESMTPS id 483C52E2E1 + for <distix@pieni.net>; Sat, 17 Oct 2015 19:55:06 +0200 (CEST) +Received: from platypus.pepperfish.net (unknown [10.112.100.20]) + by bagpuss.pepperfish.net (Postfix) with ESMTP id AE4D2BBD; + Sat, 17 Oct 2015 18:55:05 +0100 (BST) +Received: from ip6-localhost ([::1] helo=platypus.pepperfish.net) + by platypus.pepperfish.net with esmtp (Exim 4.80 #2 (Debian)) + id 1ZnVhB-0004Vo-JJ; Sat, 17 Oct 2015 18:55:05 +0100 +Received: from inmail0 ([10.112.100.10] helo=mx0.pepperfish.net) + by platypus.pepperfish.net with esmtp (Exim 4.80 #2 (Debian)) + id 1ZnVhA-0004VM-7u + for <obnam-dev@obnam.org>; Sat, 17 Oct 2015 18:55:04 +0100 +Received: from mailout.easymail.ca ([64.68.201.169]) + by mx0.pepperfish.net with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:256) + (Exim 4.80) (envelope-from <hsivonen@hsivonen.fi>) + id 1ZnVh7-0006Ku-1D + for obnam-dev@obnam.org; Sat, 17 Oct 2015 18:55:04 +0100 +Received: from localhost (localhost [127.0.0.1]) + by mailout.easymail.ca (Postfix) with ESMTP id AD899EAF8 + for <obnam-dev@obnam.org>; Sat, 17 Oct 2015 13:54:50 -0400 (EDT) +X-Virus-Scanned: Debian amavisd-new at mailout.easymail.ca +X-Spam-Flag: NO +X-Spam-Score: -3.681 +X-Spam-Level: +X-Spam-Status: No, score=-3.681 required=5 tests=[ALL_TRUSTED=-1.8, AWL=0.026, + BAYES_00=-2.599, DNS_FROM_AHBL_RHSBL=0.692] +Received: from mailout.easymail.ca ([127.0.0.1]) + by localhost (easymail-mailout.easydns.vpn [127.0.0.1]) (amavisd-new, + port 10024) with ESMTP id q5i63X3--m9U for <obnam-dev@obnam.org>; + Sat, 17 Oct 2015 13:54:50 -0400 (EDT) +Received: from mail-io0-f174.google.com (mail-io0-f174.google.com + [209.85.223.174]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) + (No client certificate requested) + by mailout.easymail.ca (Postfix) with ESMTPSA id 5223BEA8D + for <obnam-dev@obnam.org>; Sat, 17 Oct 2015 13:54:50 -0400 (EDT) +Received: by iodv82 with SMTP id v82so153037402iod.0 + for <obnam-dev@obnam.org>; Sat, 17 Oct 2015 10:54:50 -0700 (PDT) +MIME-Version: 1.0 +X-Received: by 10.107.18.91 with SMTP id a88mr3405229ioj.91.1445104490055; + Sat, 17 Oct 2015 10:54:50 -0700 (PDT) +Received: by 10.107.142.141 with HTTP; Sat, 17 Oct 2015 10:54:50 -0700 (PDT) +Date: Sat, 17 Oct 2015 20:54:50 +0300 +Message-ID: <CAJQvAufu-qnC=nrR87XN3fkHu6K7p3-Hu5A71GL+uXZ8EKCaUw@mail.gmail.com> +From: Henri Sivonen <hsivonen@hsivonen.fi> +To: obnam-dev@obnam.org +Content-Type: text/plain; charset=UTF-8 +X-Spam-Score: -2.1 +X-Spam-Score-int: -20 +X-Spam-Bar: -- +X-Scanned-By: pepperfish.net, Sat, 17 Oct 2015 18:55:04 +0100 +X-Spam-Report: Content analysis details: (-2.1 points) + pts rule name description + ---- ---------------------- -------------------------------------------------- + 0.5 PPF_RECEIVED_HTTP Received header mentions http + -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low + trust [64.68.201.169 listed in list.dnswl.org] + -0.0 SPF_PASS SPF: sender matches SPF record + -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% + [score: 0.0000] +X-ACL-Warn: message may be spam +X-Scan-Signature: fc828f4ee22ea391207ca0493f0eb918 +Subject: Enhancement: Avoid storing compressed data when compression would + expand data +X-BeenThere: obnam-dev@obnam.org +X-Mailman-Version: 2.1.5 +Precedence: list +List-Id: Obnam development discussions <obnam-dev-obnam.org> +List-Unsubscribe: <http://listmaster.pepperfish.net/cgi-bin/mailman/listinfo/obnam-dev-obnam.org>, + <mailto:obnam-dev-request@obnam.org?subject=unsubscribe> +List-Archive: <http://listmaster.pepperfish.net/pipermail/obnam-dev-obnam.org> +List-Post: <mailto:obnam-dev@obnam.org> +List-Help: <mailto:obnam-dev-request@obnam.org?subject=help> +List-Subscribe: <http://listmaster.pepperfish.net/cgi-bin/mailman/listinfo/obnam-dev-obnam.org>, + <mailto:obnam-dev-request@obnam.org?subject=subscribe> +Sender: obnam-dev-bounces@obnam.org +Errors-To: obnam-dev-bounces@obnam.org + +I have made a minor improvement to avoid storing compressed data even +when compression has been enabled in cases where compression (plus +tagging) would end up expanding the data. This avoids space waste upon +transfer and storage and compute waste upon reading. + +The change is available for pulling from the "no-expansion" branch of +the repo https://github.com/hsivonen/obnam.git (the branch contains +nothing else). Web view of the changeset: +https://github.com/hsivonen/obnam/commit/5002965ad28c89a08c370efa880a060cf7835dbd +Patch format: +https://github.com/hsivonen/obnam/commit/5002965ad28c89a08c370efa880a060cf7835dbd.patch + +I have tested the patch manually with a directory containing two files +generated with +$ head -c 1024 /dev/urandom > rand +$ head -c 1024 /dev/zero > zero +(rand doesn't compress and zero compresses very well.) + +However, I'm currently unfamiliar with the workings of yarn, so I +haven't added automated tests. If the patch isn't acceptable without +tests, I'd appreciate advice on how to do the kind of testing that +looks inside the chunk data stored in the repo. + +-- +Henri Sivonen +hsivonen@hsivonen.fi +https://hsivonen.fi/ + +_______________________________________________ +obnam-dev mailing list +obnam-dev@obnam.org +http://listmaster.pepperfish.net/cgi-bin/mailman/listinfo/obnam-dev-obnam.org |