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From: Junio C Hamano <gitster@pobox.com>
To: Jonathan Tan <jonathantanmy@google.com>
Cc: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Git mailing list" <git@vger.kernel.org>,
	"Mark Thomas" <markbt@efaref.net>,
	"Jeff Hostetler" <git@jeffhostetler.com>,
	"Kevin David" <kevin.david@microsoft.com>
Subject: Re: Proposal for missing blob support in Git repos
Date: Wed, 03 May 2017 21:29:46 -0700	[thread overview]
Message-ID: <xmqq1ss5b5xh.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <daed427f-b39e-c3d9-76ee-9c37203e1988@google.com> (Jonathan Tan's message of "Tue, 2 May 2017 14:45:06 -0700")

Jonathan Tan <jonathantanmy@google.com> writes:

> I see the semantics as "don't write what you already have", where
> "have" means what you have in local storage, but if you extend "have"
> to what upstream has, then yes, you're right that this changes
> (ignoring shallow clones).
>
> This does remove a resistance that we have against hash collision (in
> that normally we would have the correct object for a given hash and
> can resist other servers trying to introduce a wrong object, but now
> that is no longer the case), but I think it's better than consulting
> the hook whenever you want to write anything (which is also a change
> in semantics in that you're consulting an external source whenever
> you're writing an object, besides the performance implications).

As long as the above pros-and-cons analysis is understood and we are
striking a balance between performance and strictness with such an
understanding of the implications, I am perfectly fine with the
proposal.  That is why my comment has never been "I think that is
wrong" but consistently was "I wonder if that is a good thing."

Thanks.

  reply	other threads:[~2017-05-04  4:29 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-26 22:13 Proposal for missing blob support in Git repos Jonathan Tan
2017-05-01  3:57 ` Junio C Hamano
2017-05-01 19:12   ` Jonathan Tan
2017-05-01 23:29     ` Junio C Hamano
2017-05-02  0:33       ` Jonathan Tan
2017-05-02  0:38         ` Brandon Williams
2017-05-02  1:41         ` Junio C Hamano
2017-05-02 17:21           ` Jonathan Tan
2017-05-02 18:32             ` Ævar Arnfjörð Bjarmason
2017-05-02 21:45               ` Jonathan Tan
2017-05-04  4:29                 ` Junio C Hamano [this message]
2017-05-04 17:09                   ` Jonathan Tan

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