Re: [gentoo-mirrors] mirror fetch jobs and --checksum

[Adrian Reber]

On Mon, Jan 25, 2016 at 04:55:30PM +0000, Robin H. Johnson wrote:
> On Mon, Jan 25, 2016 at 11:30:54AM +0100, Nils Holland wrote:
> > On Sat, Jan 16, 2016 at 07:08:28AM +0000, Robin H. Johnson wrote:
> >
> > > All Portage calls will be including --checksum in future as well.
> >
> > Hmm, wouldn't this require that all "end-user facing" mirrors do
> > actually support checksums as well? My own tiny little community
> > mirror does, but I noticed the following:
> Hmm, so they use 'refuse options = checksum compress'.
> That is problematic, and we'll have to get mirrors to turn it off for
> the gentoo-portage module.

I am using that on my mirror and I have seen many other mirrors who are
refusing it also. I would have no problem enabling compress, but as most
mirrored data is already compressed it does not really make sense. But
to allow checksumming is something I would rather not do. If I
understand it correctly a rsync run, without transferring any data,
requires all of a sudden to read 1GB of actual data from the disk
instead of only the metadata. This is exactly the situation I am trying
to avoid.

I also see that 'refuse options' can be specified per rsync module, but
I cannot see a way to enable it for a single module and having it
disabled for all other modules.

So, from my point of view, this new requirement sounds undesirable.

		Adrian