Re: [gentoo-project] RFC: Dropping rsync as a tree distribution method

[Kent Fredric <kentnl@gentoo.org>]

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On Mon, 17 Dec 2018 19:57:21 -0800
Georgy Yakovlev <gyakovlev@gentoo.org> wrote:

> I'm guessing, but probably infra server is not supposed to handle load from 
> all the users and will temporarily ban if one tries to sync more than several 
> times per day (like rsync master does). But don't quote me on that, better ask 
> infra.

I'd imagine the server requirements with regard to load, is less for
git than it is for rsync.

Partly, because I believe rsync's require tree traversal, and dynamic
checksumming of data on the server side for each sync.

Whereas with Git, that checksumming and traversal are essentially
precomputed, and the backing store can be efficiently condensed to a
single file, with much more efficient IO.

That is, instead of iterating through 9k+ inodes, it just opens the
one and chases the parent SHA1 chains.

Then your restrictions seem to amount to total bandwidth available,
with a little CPU and IO overhead, as opposed to a larger bandwith, CPU
and IO requirement.

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