Re: Packfile can't be mapped

[Shawn Pearce <spearce@spearce.org>]

Shawn Pearce <spearce@spearce.org> wrote:
> This tree delta version came out pretty good.  The pack with tree
> deltas is 874 MiB.  Quite a reduction in size.  fast-import takes
> about 20 minutes to convert its 20 GiB input file into this 874 MiB
> pack.  Producing the 20 GiB input file from the 3 GiB CVS ,v
> files takes about 4 hours with Jon's modified cvs2svn.
> 
> Jon has started a `git-repack -a -f` with aggressive depth and
> window sizes.  He estimated it may need another 2.5 hours to process.
> Hopefully I'll hear more details tomorrow.

I just heard from Jon:
> git-repack -a -f --window=50 --depth=5000
> 100% CPU for 60 minutes
> 1.2GB resident memory
> Final pack size is 451,203,363 bytes.

So with very agressive delta depth and window sizes git-repack took
a while to run but came very close to the best packed size from
previous Mozilla CVS import attempts.  I think we'd still like to
make the final historical pack smaller than that.

-- 
Shawn.