[mirror-admin] Having to throttle back rsync on download servers

[Carlos Carvalho]

If you want to experiment with what gives best performance, fine. If
you just want to make sure updates work well it's better to limit
access to tier 1 mirrors only. That's the whole point of tiering. I
prefer this option.

We update every hour but check the timestamp of fullfilelist and only
do the dreadful scan when it's changed, so there's no impact on the
server. All mirrors that deserve access to the tier 0's should do the
same...

Stephen John Smoogen (smooge at gmail.com) wrote on 26 February 2014 09:11:
 >When trying to do the mirrors on local disks we got better in some
 >stats but were running into problems with keeping up with failed
 >disks

The number of disks in the handful tier-0 mirrors is small enough
(<~20) to be perfectly feasible to have them local.

 >keeping stuff in sync (box x out of n would always not get y package when the
 >others and that would be the one server every dns picks).

You have to trigger them from the master to avoid updates while the
repository is changing. If you monitor the update results from each
mirror you can, even automatically, pull out of the dns list the one
that didn't complete well.

It IS feasible to have mirrors with local disks. Other distros do it.

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