[arch-mirrors] Outdated mirrors

[Roman Kyrylych]

On Sat, Jun 19, 2010 at 23:41, Mihael Pranjić <mpranj at limun.org> wrote:
> Am 2010-06-19 14:11, schrieb Roman Kyrylych:
>> Do you suggest to increase sync time to less than 1 hour?
>> Perhaps we could try that.
>
> Yip, I think syncing more often could improve the situation, since it
> does not really make much more traffic. It's rather a problem if you
> sync only once a day so the main mirror has to deal with more traffic in
> less time. Syncing every 15 minutes (on a random minute) could even
> improve performance since we would sync 100mb now, 100 later, instead of
> having a dozen servers syncing 200mb at the same time. I could also be
> wrong.

I see your point.
Well, if there are no difficulties for mirrors with using more frequent updates,
I see no reason why it should not be possible,
especially after we completely turn off rsync access
to archlinux.org for all non-tier1 mirrors soon.

> However, another result of this (if applied to all mirrors) is that some
> probably don't sync from the tier-2 mirrors. Say server D syncs from C,
> C syncs from B, B syncs from A and they do it only once in an hour,
> could result in a huge time gap between commit on server A
> (archlinux.org) and sync on server D. In fact, I think this is also
> important because of our mirroring scheme, concerning that we don't sync
> from archlinux.org any more - so syncing could take 30 minutes until a
> new file gets from archlinux.org to an actual mirror from where users
> update.

Yes, there are some mirrors currently, that use a longer sync chain,
but as more mirrors move to 2-tier scheme, I ask admins to sync
only from tier1 mirrors (which all sync once per hour).

-- 
Roman Kyrylych (Роман Кирилич)