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Conversion of Perl Perforce repository to Subversion - Part 1: msg#00001

version-control.revml

Subject: Conversion of Perl Perforce repository to Subversion - Part 1

I have [stupidly] agreed to test the feasibility of converting the main Perl repository from Perforce to Subversion. Initially, this would be to provide a readonly public repository; eventually, it might lead to development being moved permanently from P4 to SVN. I have two questions, the first more of a possible design issue with VCP and the second more of a practical question based on my incomplete understanding of VCP, so I'll leave the second question for another message.

I am using CLKao's svk to mirror the Perforce repository, which ultimately uses VCP to do the heavy lifting. I've attempted the conversion twice and both times, the server eventually swapped itself almost to death due to the huge RAM requirements (first 512MB then 2GB actual memory installed). Based on my readings of the LIMITATIONS in VCP::Dest::revml, the odds are good that the basic design is flawed for such a large conversion (64k revisions).

I don't know where to start looking; I assume if I could find out what hash is being used to store the metadata, I could convert that to a tied hash and trade performance for being able to actually finish the conversion. I'm not even sure if this is a flaw in VCP::Dest::svk or if it is in one of the other modules that makes up VCP.

Any hints and directions to start my hunt would be appreciated.

John

--
John Peacock
Director of Information Research and Technology
Rowman & Littlefield Publishing Group
4501 Forbes Boulevard
Suite H
Lanham, MD 20706
301-459-3366 x.5010
fax 301-429-5748


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