[PATCH 1 of 6] changegroup: use a different compression key for BZ in HG10

[Gregory Szorc]

On Wed, Sep 23, 2015 at 9:21 PM, Pierre-Yves David <
pierre-yves.david at ens-lyon.org> wrote:

> # HG changeset patch
> # User Pierre-Yves David <pierre-yves.david at fb.com>
> # Date 1443033210 25200
> #      Wed Sep 23 11:33:30 2015 -0700
> # Node ID 0e8207361f5a0eb27fd92288c34c5bb3d1d3eb53
> # Parent  f946c1260035f96aa30052c28e6c68c559677059
> changegroup: use a different compression key for BZ in HG10
>
>
Related to this series, at some point I'd like to formalize the `hg clone
--uncompressed` "bundle" format as something that can be saved to a file
and handled by `hg unbundle` as well as `hg clone`. As the work I've done
at Mozilla has shown, "stream bundles," while larger, are insanely fast to
apply (they are basically tar archives of revlogs), making them ideal for
fast network environments such as datacenters. They are the different
between 5 and 1 minute clones. Also, I think moving "stream bundles" to the
"getbundle" wire protocol command (instead of maintaining a one-off) makes
some sense.

I'm not sure how this should be done. New magic value in the bundle header?
Separate bundle2 part?

I just wanted to let you know about this in case it impacts your work here.
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