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Date: Mon, 6 Oct 2014 08:30:10 +0100
From: Julian Foad <julianfoad@btopenworld.com>
Reply-To: Julian Foad <julianfoad@btopenworld.com>
Subject: Re: Official way to create an empty revision
To: Daniel Shahaf <d.s@daniel.shahaf.name>,
  Konstantin Kolinko <knst.kolinko@gmail.com>
Cc: dev <dev@subversion.apache.org>
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Daniel Shahaf wrote:=0A=0A> Konstantin Kolinko wrote on Thu, Oct 02, 2014 a=
t 03:40:51 +0400:=0A>>  My thought:=0A>> =0A>>  svnadmin bump -m "message" =
REPOS_PATH=0A>>  svnrdump bump -m "message" URL=0A>> =0A>>  The command cre=
ates 1 empty revision and thus bumps the repository=0A>>  revision number. =
It can be repeated in a loop as necessary.=0A> =0A> Two proof-of-concept pa=
tches implementing this are attached. [...]=0A=0AThe Subversion project his=
tory =0Astarts at revision 836420 in the ASF repository. If I want to clone=
 it, =0Aone use case for this feature would be to initialize my new reposit=
ory =0Awith 836420 empty revisions. An external loop is going to be slow on=
 =0Athis scale. On my machine with SSD disk, "svnmucc mkdir file://..." =0A=
takes 1/8 sec and even "svnadmin delrevprop" takes 1/25 sec, so that's =0Al=
ooking like taking a substantial proportion of a *day* to complete 836420=
=0A commits.=0A=0AThat's one reason why I think the UI should allow specify=
ing how many revisions to create. Even if an initial implementation with an=
 internal loop is currently no faster, at least it opens the possibility of=
 changing the implementation later.=0A=0A- Julian=0A