Re: Best way to merge two repos with same content, different history

On Fri, Jun 05, 2009 at 12:10:30PM -0500, Kelly F. Hickel wrote:

Bost, 
	Thanks, but I'm already working with a local copy of the CVS repo.
	I've corresponded with Michael Haggerty about the time this takes,
	and there just doesn't seem to be any way to improve the speed,
	without making some fairly drastic changes to cvs2git.

I've been working with mhagger lately as it also pertains to the Gentoo
conversion. We've made some very good progress.

A couple of comments in that regard:
- Make really sure your box is not short of RAM. Throw some measurement
  tools onto there to see it. A couple of GiB is worthwhile. After we
  found this early on, and switched boxes, we dropped from our initial
  multiple days to 20 hours.
- His latest ExternalBlobGenerator code (_NOT_ available in SVN yet)
  reduced our pass1 time from 36204 seconds to 1598 seconds, with
  a potential to be much faster now, as parallelization of part of that
  is now trivial.
- pass9 is still the remaining large time-eater for us. I've started to
  look at it, but I haven't made any actual developments yet.

Would you mind posting your cvs2svn stats like these?
http://archives.gentoo.org/gentoo-scm/msg_b69b2f6ecee0ec7bb402d31b372b945b.xml

-- 
Robin Hugh Johnson
Gentoo Linux Developer & Infra Guy
E-Mail     : robbat2@gentoo.org
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