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From: Junio C Hamano <gitster@pobox.com>
To: Derrick Stolee <stolee@gmail.com>
Cc: git@vger.kernel.org, dstolee@microsoft.com,
	git@jeffhostetler.com, peff@peff.net, jonathantanmy@google.com,
	sbeller@google.com, szeder.dev@gmail.com
Subject: Re: [PATCH v3 07/14] commit-graph: update graph-head during write
Date: Mon, 12 Feb 2018 12:37:17 -0800	[thread overview]
Message-ID: <xmqqwozirlky.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <xmqqeflqt4st.fsf@gitster-ct.c.googlers.com> (Junio C. Hamano's message of "Mon, 12 Feb 2018 10:56:50 -0800")

Junio C Hamano <gitster@pobox.com> writes:

> Derrick Stolee <stolee@gmail.com> writes:
>
>> It is possible to have multiple commit graph files in a pack directory,
>> but only one is important at a time. Use a 'graph_head' file to point
>> to the important file. Teach git-commit-graph to write 'graph_head' upon
>> writing a new commit graph file.
>
> Why this design, instead of what "repack -a" would do, iow, if there
> always is a singleton that is the only one that matters, shouldn't
> the creation of that latest singleton just clear the older ones
> before it returns control?

Note that I am not complaining---I am just curious why we want to
expose this "there is one relevant one but we keep irrelevant ones
we usually do not look at and need to be garbage collected" to end
users, and also expect readers of the series, resulting code and
docs would have the same puzzled feeling.



  reply	other threads:[~2018-02-12 20:37 UTC|newest]

Thread overview: 146+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-30 21:39 [PATCH v2 00/14] Serialized Git Commit Graph Derrick Stolee
2018-01-30 21:39 ` [PATCH v2 01/14] commit-graph: add format document Derrick Stolee
2018-02-01 21:44   ` Jonathan Tan
2018-01-30 21:39 ` [PATCH v2 02/14] graph: add commit graph design document Derrick Stolee
2018-01-31  2:19   ` Stefan Beller
2018-01-30 21:39 ` [PATCH v2 03/14] commit-graph: create git-commit-graph builtin Derrick Stolee
2018-02-02  0:53   ` SZEDER Gábor
2018-01-30 21:39 ` [PATCH v2 04/14] commit-graph: implement construct_commit_graph() Derrick Stolee
2018-02-01 22:23   ` Jonathan Tan
2018-02-01 23:46   ` SZEDER Gábor
2018-02-02 15:32   ` SZEDER Gábor
2018-02-05 16:06     ` Derrick Stolee
2018-02-07 15:08       ` SZEDER Gábor
2018-02-07 15:10         ` Derrick Stolee
2018-01-30 21:39 ` [PATCH v2 05/14] commit-graph: implement git-commit-graph --write Derrick Stolee
2018-02-01 23:33   ` Jonathan Tan
2018-02-02 18:36     ` Stefan Beller
2018-02-02 22:48       ` Junio C Hamano
2018-02-03  1:58         ` Derrick Stolee
2018-02-03  9:28           ` Jeff King
2018-02-05 18:48             ` Junio C Hamano
2018-02-06 18:55               ` Derrick Stolee
2018-02-01 23:48   ` SZEDER Gábor
2018-02-05 18:07     ` Derrick Stolee
2018-02-02  1:47   ` SZEDER Gábor
2018-01-30 21:39 ` [PATCH v2 06/14] commit-graph: implement git-commit-graph --read Derrick Stolee
2018-01-31  2:22   ` Stefan Beller
2018-02-02  0:02   ` SZEDER Gábor
2018-02-02  0:23   ` Jonathan Tan
2018-02-05 19:29     ` Derrick Stolee
2018-01-30 21:39 ` [PATCH v2 07/14] commit-graph: implement git-commit-graph --update-head Derrick Stolee
2018-02-02  1:35   ` SZEDER Gábor
2018-02-05 21:01     ` Derrick Stolee
2018-02-02  2:45   ` SZEDER Gábor
2018-01-30 21:39 ` [PATCH v2 08/14] commit-graph: implement git-commit-graph --clear Derrick Stolee
2018-02-02  4:01   ` SZEDER Gábor
2018-01-30 21:39 ` [PATCH v2 09/14] commit-graph: teach git-commit-graph --delete-expired Derrick Stolee
2018-02-02 15:04   ` SZEDER Gábor
2018-01-30 21:39 ` [PATCH v2 10/14] commit-graph: add core.commitgraph setting Derrick Stolee
2018-01-31 22:44   ` Igor Djordjevic
2018-02-02 16:01   ` SZEDER Gábor
2018-01-30 21:39 ` [PATCH v2 11/14] commit: integrate commit graph with commit parsing Derrick Stolee
2018-02-02  1:51   ` Jonathan Tan
2018-02-06 14:53     ` Derrick Stolee
2018-01-30 21:39 ` [PATCH v2 12/14] commit-graph: read only from specific pack-indexes Derrick Stolee
2018-01-30 21:39 ` [PATCH v2 13/14] commit-graph: close under reachability Derrick Stolee
2018-01-30 21:39 ` [PATCH v2 14/14] commit-graph: build graph from starting commits Derrick Stolee
2018-01-30 21:47 ` [PATCH v2 00/14] Serialized Git Commit Graph Stefan Beller
2018-02-01  2:34   ` Stefan Beller
2018-02-08 20:37 ` [PATCH v3 " Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 01/14] commit-graph: add format document Derrick Stolee
2018-02-08 21:21     ` Junio C Hamano
2018-02-08 21:33       ` Derrick Stolee
2018-02-08 23:16         ` Junio C Hamano
2018-02-08 20:37   ` [PATCH v3 02/14] graph: add commit graph design document Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 03/14] commit-graph: create git-commit-graph builtin Derrick Stolee
2018-02-08 21:27     ` Junio C Hamano
2018-02-08 21:36       ` Derrick Stolee
2018-02-08 23:21         ` Junio C Hamano
2018-02-08 20:37   ` [PATCH v3 04/14] commit-graph: implement write_commit_graph() Derrick Stolee
2018-02-08 22:14     ` Junio C Hamano
2018-02-15 18:19     ` Junio C Hamano
2018-02-15 18:23       ` Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 05/14] commit-graph: implement 'git-commit-graph write' Derrick Stolee
2018-02-13 21:57     ` Jonathan Tan
2018-02-08 20:37   ` [PATCH v3 06/14] commit-graph: implement 'git-commit-graph read' Derrick Stolee
2018-02-08 23:38     ` Junio C Hamano
2018-02-08 20:37   ` [PATCH v3 07/14] commit-graph: update graph-head during write Derrick Stolee
2018-02-12 18:56     ` Junio C Hamano
2018-02-12 20:37       ` Junio C Hamano [this message]
2018-02-12 21:24         ` Derrick Stolee
2018-02-13 22:38     ` Jonathan Tan
2018-02-08 20:37   ` [PATCH v3 08/14] commit-graph: implement 'git-commit-graph clear' Derrick Stolee
2018-02-13 22:49     ` Jonathan Tan
2018-02-08 20:37   ` [PATCH v3 09/14] commit-graph: implement --delete-expired Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 10/14] commit-graph: add core.commitGraph setting Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 11/14] commit: integrate commit graph with commit parsing Derrick Stolee
2018-02-14  0:12     ` Jonathan Tan
2018-02-14 18:08       ` Derrick Stolee
2018-02-15 18:25     ` Junio C Hamano
2018-02-08 20:37   ` [PATCH v3 12/14] commit-graph: close under reachability Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 13/14] commit-graph: read only from specific pack-indexes Derrick Stolee
2018-02-08 20:37   ` [PATCH v3 14/14] commit-graph: build graph from starting commits Derrick Stolee
2018-02-09 13:02     ` SZEDER Gábor
2018-02-09 13:45       ` Derrick Stolee
2018-02-14 18:15   ` [PATCH v3 00/14] Serialized Git Commit Graph Derrick Stolee
2018-02-14 18:27     ` Stefan Beller
2018-02-14 19:11       ` Derrick Stolee
2018-02-19 18:53     ` [PATCH v4 00/13] " Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 01/13] commit-graph: add format document Derrick Stolee
2018-02-20 20:49         ` Junio C Hamano
2018-02-21 19:23         ` Stefan Beller
2018-02-21 19:45           ` Derrick Stolee
2018-02-21 19:48             ` Stefan Beller
2018-03-30 13:25         ` Jakub Narebski
2018-04-02 13:09           ` Derrick Stolee
2018-04-02 14:09             ` Jakub Narebski
2018-02-19 18:53       ` [PATCH v4 02/13] graph: add commit graph design document Derrick Stolee
2018-02-20 21:42         ` Junio C Hamano
2018-02-23 15:44           ` Derrick Stolee
2018-02-21 19:34         ` Stefan Beller
2018-02-19 18:53       ` [PATCH v4 03/13] commit-graph: create git-commit-graph builtin Derrick Stolee
2018-02-20 21:51         ` Junio C Hamano
2018-02-21 18:58           ` Junio C Hamano
2018-02-23 16:07             ` Derrick Stolee
2018-02-26 16:25         ` SZEDER Gábor
2018-02-26 17:08           ` Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 04/13] commit-graph: implement write_commit_graph() Derrick Stolee
2018-02-20 22:57         ` Junio C Hamano
2018-02-23 17:23           ` Derrick Stolee
2018-02-23 19:30             ` Junio C Hamano
2018-02-23 19:48               ` Junio C Hamano
2018-02-23 20:02               ` Derrick Stolee
2018-02-26 16:10         ` SZEDER Gábor
2018-02-28 18:47         ` Junio C Hamano
2018-02-19 18:53       ` [PATCH v4 05/13] commit-graph: implement 'git-commit-graph write' Derrick Stolee
2018-02-21 19:25         ` Junio C Hamano
2018-02-19 18:53       ` [PATCH v4 06/13] commit-graph: implement git commit-graph read Derrick Stolee
2018-02-21 20:11         ` Junio C Hamano
2018-02-22 18:25           ` Junio C Hamano
2018-02-19 18:53       ` [PATCH v4 07/13] commit-graph: implement --set-latest Derrick Stolee
2018-02-22 18:31         ` Junio C Hamano
2018-02-23 17:53           ` Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 08/13] commit-graph: implement --delete-expired Derrick Stolee
2018-02-21 21:34         ` Stefan Beller
2018-02-23 17:43           ` Derrick Stolee
2018-02-22 18:48         ` Junio C Hamano
2018-02-23 17:59           ` Derrick Stolee
2018-02-23 19:33             ` Junio C Hamano
2018-02-23 19:41               ` Derrick Stolee
2018-02-23 19:51                 ` Junio C Hamano
2018-02-19 18:53       ` [PATCH v4 09/13] commit-graph: add core.commitGraph setting Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 10/13] commit-graph: close under reachability Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 11/13] commit: integrate commit graph with commit parsing Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 12/13] commit-graph: read only from specific pack-indexes Derrick Stolee
2018-02-21 22:25         ` Stefan Beller
2018-02-23 19:19           ` Derrick Stolee
2018-02-19 18:53       ` [PATCH v4 13/13] commit-graph: build graph from starting commits Derrick Stolee
2018-03-30 11:10       ` [PATCH v4 00/13] Serialized Git Commit Graph Jakub Narebski
2018-04-02 13:02         ` Derrick Stolee
2018-04-02 14:46           ` Jakub Narebski
2018-04-02 15:02             ` Derrick Stolee
2018-04-02 17:35               ` Stefan Beller
2018-04-02 17:54                 ` Derrick Stolee
2018-04-02 18:02                   ` Stefan Beller
2018-04-07 22:37               ` Jakub Narebski

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