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From: Taylor Blau <me@ttaylorr.com>
To: Jonathan Tan <jonathantanmy@google.com>
Cc: git@vger.kernel.org, Derrick Stolee <derrickstolee@github.com>,
	Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH v5 1/4] gitformat-commit-graph: describe version 2 of BDAT
Date: Thu, 20 Jul 2023 21:38:18 -0400	[thread overview]
Message-ID: <ZLnhihfaRDUmlsi3@nand.local> (raw)
In-Reply-To: <20230720202006.3815802-1-jonathantanmy@google.com>

On Thu, Jul 20, 2023 at 01:20:06PM -0700, Jonathan Tan wrote:
> Having said that, I am inclined to not change this, so that the offset
> calculations are the same for both versions (e.g. in the test tool
> too), and as far as I know, we haven't had problems with this. But I can
> change it if people want.

Yeah, I definitely get your hesitation. I wonder if the test helper
patches that I sent change your thinking on this at all, since then
we're not relying on those scripts at all to compute the offset of the
BDAT chunk and dump its contents.

To be clear, I do think that this is probably outside the immediate
scope of this series. But since we're changing the on-disk format and
bumping the version count forward, I think that we want to make sure
that we're not missing any other format changes that we'd like to make
along the way.

I suppose that a theoretical v3 of the BDAT chunk's format would use the
same encoding for Bloom filters. But storing an extra 4-bytes of
information in the header of the Bloom data chunk feels like we could
squash that in.

Thanks,
Taylor

  reply	other threads:[~2023-07-21  1:38 UTC|newest]

Thread overview: 116+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-22 21:48 [PATCH 0/2] Changed path filter hash fix and version bump Jonathan Tan
2023-05-22 21:48 ` [PATCH 1/2] t4216: test wrong bloom filter version rejection Jonathan Tan
2023-05-22 21:48 ` [PATCH 2/2] commit-graph: fix murmur3, bump filter ver. to 2 Jonathan Tan
2023-05-23 13:00   ` Derrick Stolee
2023-05-23 23:00     ` Jonathan Tan
2023-05-23 23:51     ` Junio C Hamano
2023-05-24 21:26       ` Jonathan Tan
2023-05-26 13:19         ` Derrick Stolee
2023-05-30 17:26           ` Jonathan Tan
2023-05-23  4:42 ` [PATCH 0/2] Changed path filter hash fix and version bump Junio C Hamano
2023-05-31 23:12 ` [PATCH v2 0/3] " Jonathan Tan
2023-05-31 23:12   ` [PATCH v2 1/3] t4216: test changed path filters with high bit paths Jonathan Tan
2023-05-31 23:12   ` [PATCH v2 2/3] repo-settings: introduce commitgraph.changedPathsVersion Jonathan Tan
2023-05-31 23:12   ` [PATCH v2 3/3] commit-graph: new filter ver. that fixes murmur3 Jonathan Tan
2023-06-03  1:01   ` [PATCH v2 0/3] Changed path filter hash fix and version bump Junio C Hamano
2023-06-03  2:24     ` Junio C Hamano
2023-06-07 16:30       ` Jonathan Tan
2023-06-07 21:37         ` Jonathan Tan
2023-06-08 19:21 ` [PATCH v3 0/4] " Jonathan Tan
2023-06-08 19:21   ` [PATCH v3 1/4] gitformat-commit-graph: describe version 2 of BDAT Jonathan Tan
2023-06-08 19:52     ` Ramsay Jones
2023-06-12 21:26       ` Junio C Hamano
2023-06-08 19:21   ` [PATCH v3 2/4] t4216: test changed path filters with high bit paths Jonathan Tan
2023-06-08 19:21   ` [PATCH v3 3/4] repo-settings: introduce commitgraph.changedPathsVersion Jonathan Tan
2023-06-08 19:21   ` [PATCH v3 4/4] commit-graph: new filter ver. that fixes murmur3 Jonathan Tan
2023-06-08 19:50   ` [PATCH v3 0/4] Changed path filter hash fix and version bump Ramsay Jones
2023-06-09  0:08     ` Jonathan Tan
2023-06-12 21:31     ` Junio C Hamano
2023-06-13 17:16       ` Jonathan Tan
2023-06-13 17:29         ` [PATCH] CodingGuidelines: use octal escapes, not hex Jonathan Tan
2023-06-13 18:16           ` Eric Sunshine
2023-06-13 18:43             ` Jonathan Tan
2023-06-13 19:15               ` Eric Sunshine
2023-06-13 19:29                 ` Junio C Hamano
2023-06-13 19:16         ` [PATCH v3 0/4] Changed path filter hash fix and version bump Junio C Hamano
2023-06-13 17:39 ` [PATCH v4 " Jonathan Tan
2023-06-13 17:39   ` [PATCH v4 1/4] gitformat-commit-graph: describe version 2 of BDAT Jonathan Tan
2023-06-13 21:58     ` Junio C Hamano
2023-06-20 13:22       ` Derrick Stolee
2023-06-21 12:08       ` Taylor Blau
2023-06-22 22:26         ` Jonathan Tan
2023-06-23 13:05           ` Derrick Stolee
2023-06-13 17:39   ` [PATCH v4 2/4] t4216: test changed path filters with high bit paths Jonathan Tan
2023-06-13 17:39   ` [PATCH v4 3/4] repo-settings: introduce commitgraph.changedPathsVersion Jonathan Tan
2023-06-20 13:28     ` Derrick Stolee
2023-06-21 12:14     ` Taylor Blau
2023-06-13 17:39   ` [PATCH v4 4/4] commit-graph: new filter ver. that fixes murmur3 Jonathan Tan
2023-06-20 13:39     ` Derrick Stolee
2023-06-20 18:37       ` Junio C Hamano
2023-06-13 19:21   ` [PATCH v4 0/4] Changed path filter hash fix and version bump Junio C Hamano
2023-06-20 13:43     ` Derrick Stolee
2023-06-20 21:56       ` Jonathan Tan
2023-06-21 12:19       ` Taylor Blau
2023-06-21 17:53         ` Derrick Stolee
2023-06-22 22:27           ` Jonathan Tan
2023-06-23 13:18             ` Derrick Stolee
2023-07-13 21:42 ` [PATCH v5 " Jonathan Tan
2023-07-13 21:42   ` [PATCH v5 1/4] gitformat-commit-graph: describe version 2 of BDAT Jonathan Tan
2023-07-19 17:25     ` Taylor Blau
2023-07-20 20:20       ` Jonathan Tan
2023-07-21  1:38         ` Taylor Blau [this message]
2023-07-13 21:42   ` [PATCH v5 2/4] t4216: test changed path filters with high bit paths Jonathan Tan
2023-07-13 22:50     ` Junio C Hamano
2023-07-19 17:27       ` Taylor Blau
2023-07-19 17:55         ` [PATCH 0/4] commit-graph: avoid looking at Bloom filter data directly Taylor Blau
2023-07-19 17:55           ` [PATCH 1/4] t/helper/test-read-graph.c: extract `dump_graph_info()` Taylor Blau
2023-07-19 17:55           ` [PATCH 2/4] bloom.h: make `load_bloom_filter_from_graph()` public Taylor Blau
2023-07-19 17:55           ` [PATCH 3/4] t/helper/test-read-graph: implement `bloom-filters` mode Taylor Blau
2023-07-19 17:55           ` [PATCH 4/4] fixup! t4216: test changed path filters with high bit paths Taylor Blau
2023-07-19 19:24           ` [PATCH 0/4] commit-graph: avoid looking at Bloom filter data directly Junio C Hamano
2023-07-20 20:22           ` Jonathan Tan
2023-07-13 21:42   ` [PATCH v5 3/4] repo-settings: introduce commitgraph.changedPathsVersion Jonathan Tan
2023-07-19 18:10     ` Taylor Blau
2023-07-20 20:42       ` Jonathan Tan
2023-07-20 21:02         ` Taylor Blau
2023-07-13 21:42   ` [PATCH v5 4/4] commit-graph: new filter ver. that fixes murmur3 Jonathan Tan
2023-07-19 18:24     ` Taylor Blau
2023-07-20 21:27       ` Jonathan Tan
2023-07-26 23:32         ` Taylor Blau
2023-07-13 22:16   ` [PATCH v5 0/4] Changed path filter hash fix and version bump Junio C Hamano
2023-07-13 22:59     ` Junio C Hamano
2023-07-14 18:48     ` Jonathan Tan
2023-07-20 21:46 ` [PATCH v6 0/7] " Jonathan Tan
2023-07-20 21:46   ` [PATCH v6 1/7] gitformat-commit-graph: describe version 2 of BDAT Jonathan Tan
2023-07-20 21:46   ` [PATCH v6 2/7] t/helper/test-read-graph.c: extract `dump_graph_info()` Jonathan Tan
2023-07-26 23:26     ` Taylor Blau
2023-07-20 21:46   ` [PATCH v6 3/7] bloom.h: make `load_bloom_filter_from_graph()` public Jonathan Tan
2023-07-20 21:46   ` [PATCH v6 4/7] t/helper/test-read-graph: implement `bloom-filters` mode Jonathan Tan
2023-07-20 21:46   ` [PATCH v6 5/7] t4216: test changed path filters with high bit paths Jonathan Tan
2023-07-26 23:28     ` Taylor Blau
2023-07-20 21:46   ` [PATCH v6 6/7] repo-settings: introduce commitgraph.changedPathsVersion Jonathan Tan
2023-07-20 21:46   ` [PATCH v6 7/7] commit-graph: new filter ver. that fixes murmur3 Jonathan Tan
2023-07-25 20:52   ` [PATCH v6 0/7] Changed path filter hash fix and version bump Junio C Hamano
2023-07-26 20:39   ` Junio C Hamano
2023-07-27  0:17     ` Taylor Blau
2023-07-27  0:49       ` Junio C Hamano
2023-07-27 17:39         ` Jonathan Tan
2023-07-27 17:56           ` Taylor Blau
2023-07-27 20:53             ` Jonathan Tan
2023-08-01 18:08               ` Taylor Blau
2023-08-01 18:52                 ` Jonathan Tan
2023-08-03  0:01                 ` Taylor Blau
2023-08-03 13:18                   ` Derrick Stolee
2023-08-03 18:45                     ` Taylor Blau
2023-07-27 18:44         ` Junio C Hamano
2023-08-01 18:41 ` [PATCH v7 " Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 1/7] gitformat-commit-graph: describe version 2 of BDAT Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 2/7] t/helper/test-read-graph.c: extract `dump_graph_info()` Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 3/7] bloom.h: make `load_bloom_filter_from_graph()` public Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 4/7] t/helper/test-read-graph: implement `bloom-filters` mode Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 5/7] t4216: test changed path filters with high bit paths Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 6/7] repo-settings: introduce commitgraph.changedPathsVersion Jonathan Tan
2023-08-01 18:41   ` [PATCH v7 7/7] commit-graph: new filter ver. that fixes murmur3 Jonathan Tan
2023-08-01 18:44   ` [PATCH v7 0/7] Changed path filter hash fix and version bump Junio C Hamano
2023-08-01 20:58     ` Taylor Blau
2023-08-01 21:07       ` Junio C Hamano

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