From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jonathan Nieder <jrnieder@gmail.com>
Subject: Re: [PATCH v2 00/12] vcs-svn: incremental import
Date: Mon, 7 Mar 2011 15:23:30 -0600
Message-ID: <20110307212330.GA15732@elie>
References: <20101210102007.GA26298@burratino>
 <20110306225419.GA24327@elie>
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Cc: git@vger.kernel.org, David Barr <david.barr@cordelta.com>,
	Ramkumar Ramachandra <artagnon@gmail.com>,
	Sam Vilain <sam@vilain.net>, Stephen Bash <bash@genarts.com>,
	Tomas Carnecky <tom@dbservice.com>
To: Sverre Rabbelier <srabbelier@gmail.com>
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Sverre Rabbelier wrote:
> On Sun, Mar 6, 2011 at 23:54, Jonathan Nieder <jrnieder@gmail.com> wrote:

>> Patch 1 changes the mark numbers for blobs to be ridiculously high,
>> to make room for memorable commit marks (:1 for r1, :2 for r2, etc).
>
> How high is rediculously high?

2^30.  Later in the series (vcs-svn: eliminate repo_tree structure)
the blob marks are eliminated altogether.

> "Marks are stored in a sparse array, using 1 pointer (4 bytes or 8
> bytes, depending on pointer size) per mark. Although the array is
> sparse, frontends are still strongly encouraged to use marks between 1
> and n, where n is the total number of marks required for this import."

I assume that is mostly meant to make it easier to write alternate
backends.