On Fri, 15 Sep 2017, Shanker Wang wrote:

> > On Thu, Sep 07, 2017 at 11:02:40PM +0800, Shanker Wang wrote:
> >>> One of the two mirrors behind mirrors.tuna.tsinghua.edu.cn is currently
> >>> out of date.
> > 
> > Currently both mirrors are updated almost three hours apart, even if
> > triggered at the same time.  Please investigate why this happens.
> 
> That's because the trigger cannot assure that sync is started immediately.
> When the limit of concurrent syncing jobs is reached, other jobs will be 
> pending in queue.

Then these services probably should not be available behind a common
name.  Apt gets very confused if the data on "one server" changes
between requests, therefore the window where mirrors have a different
state should be kept as small as possible.

To which of the two mirrors should ftp2.cn.debian.org point, and should
we replace mirrors.tuna.tsinghua.edu.cn in our list with nano and neo?

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