From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.8 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 8982E211B3 for ; Tue, 4 Dec 2018 14:17:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726250AbeLDOR1 (ORCPT ); Tue, 4 Dec 2018 09:17:27 -0500 Received: from mail-qt1-f172.google.com ([209.85.160.172]:37718 "EHLO mail-qt1-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726152AbeLDOR1 (ORCPT ); Tue, 4 Dec 2018 09:17:27 -0500 Received: by mail-qt1-f172.google.com with SMTP id z16so18155237qtq.4 for ; Tue, 04 Dec 2018 06:17:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=tu+rs8CaXWPeUFR/3BKvtwyImHkmkR3PxI6Hxayg4qU=; b=k2ptIU+3EiFJ/rtmmT5cHZ96I3Y3LLPVwRpAj/9h6u7qA5f4YIxjZuNg+cI+DiLGsf 1bxRKIkf98kBGOeoPR0YnpjV87uIL8CjTF0GJGK+gRjthWOhEQRcy2GgcdCcHPDA83IG O1KyFL/F5PAPqs27Nhhz8J0wLmrJ/IemB3BN8r1XttknNffl7Jw89Hq+0T3T9NVm3Si/ A2/H8eSSGzl49fkvitkOREHswn8c9WDdpWAY6+i3iRY+Od9YP6+q/tIIEMcoCPiiu6bW iA60rBdP2FgA6sS2D+/uPxE81Qf2FQNn7vNiXTx/incnaSwBLZz/U5fTf3kv4ybhT0EB NVGg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=tu+rs8CaXWPeUFR/3BKvtwyImHkmkR3PxI6Hxayg4qU=; b=Jsln1cPhWRdsY64YoUyd5Ar5VqFOUYRX6emLLX4L0EFECONJEyqiIMqNKSaaDYlLGg KoIrCT5x6wj68luM5FoVk8A2MC+RMlljA1CNBo6bWIiQuybkoQSvgzk9PqbA/04nv7Kp 2yvRcyMEIO8S+Dqn7DmV/Ag8TLOTlhARNt+fK5kly83HuKlPnnubMdKAamhE5bvWSRtC +EgQWQd84cbRNpDL+QQP9v3qCjPIuioTFb5kv/8yT49B83KsMfzS/ZxMs+180VH8+/G6 kcAmQk3WUfJxdIo7OofbtrDbfcB9uQScm4F9UA+775nu2nhJXoiJbmE2O0MGUypMJCoR JdGA== X-Gm-Message-State: AA+aEWbHWeGhibzK55fhpRoYGfxwXyNc4K0t8Bef8q6qEAuTZD66XnQ7 j+/Gxl7duc9qFZiIUEoOTTs= X-Google-Smtp-Source: AFSGD/XJiru/0xHfRF9IdyZuKkdiBbGnj/889Ph7x2OX94oQ3PkhY3ufAX9xVM0hdMqwaj4OhaJoKg== X-Received: by 2002:ac8:7644:: with SMTP id i4mr19846487qtr.293.1543933045030; Tue, 04 Dec 2018 06:17:25 -0800 (PST) Received: from ?IPv6:2001:4898:6808:13e:e4aa:d284:87ba:6dee? ([2001:4898:8010:0:cde0:d284:87ba:6dee]) by smtp.gmail.com with ESMTPSA id n71sm11817145qkh.59.2018.12.04.06.17.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Dec 2018 06:17:23 -0800 (PST) Subject: Re: How de-duplicate similar repositories with alternates To: =?UTF-8?B?w4Z2YXIgQXJuZmrDtnLDsCBCamFybWFzb24=?= , git , Git for human beings Cc: Christian Couder References: <87zhtsx73l.fsf@evledraar.gmail.com> <87sgzdv2gz.fsf@evledraar.gmail.com> From: Derrick Stolee Message-ID: Date: Tue, 4 Dec 2018 09:17:20 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:64.0) Gecko/20100101 Thunderbird/64.0 MIME-Version: 1.0 In-Reply-To: <87sgzdv2gz.fsf@evledraar.gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org On 12/4/2018 8:35 AM, Ævar Arnfjörð Bjarmason wrote: > The leftover space > spent is the commit-grah (not de-duped like objects are), and... The commit-graph could be shared, as the commits in each enlistment can be parsed from local with GENERATION_NUMBER_INFINITY, giving us similar speedups. The issue is: who updates the file? As the commit-graph gets behind, performance will degrade. But it seems like you'd need similar maintenance on the alternate object store, anyway. Thanks, -Stolee