[CentOS-mirror] 5.6 is coming closer

Thu Apr 7 15:03:58 UTC 2011
Roelf Wichertjes <info at roelf.org>

Oh, by the way:
What's "mirror age, daily stats" at the mirror list?
I'm increasing the sync rate to once an hour.


--------------------
Roelf Software
software.roelf.org
www.roelf.org
--------------------

Op 7 apr. 2011 om 16:58 heeft Roelf Wichertjes <info at roelf.org> het volgende geschreven:

> I've got the bandwith and speed for it,
> I once pulled all 7 install iso's (at the same time) from a high ranked mirror, it took me 16 min.
> Then did the same but now used my mirror, it took me 15 min.
> My bandwith is enough.
> Ps. I know what a busy server is.
> I get a bonus from my host if i have a lot of traffic.
> I forgot the tier of the site and i removed the --delete flag.
> (my mail software is broken and the webmail i'm using can't handle the e-mail format of the list-admin, so i can't read the mail in which he told me the tier).
> 
> I'm ready for it!
> 
> 
> --------------------
> Roelf Software
> software.roelf.org
> www.roelf.org
> --------------------
> 
> Op 6 apr. 2011 om 20:42 heeft "Paul Stewart" <pstewart at nexicomgroup.net> het volgende geschreven:
> 
>> I'm curious as to what a busy mirror is...
>> 
>> We are currently delivering about 60GB a day of CentOS files... does
>> that put us at the bottom or near the top? ;)
>> 
>> Paul
>> 
>> 
>> 
>> -----Original Message-----
>> From: centos-mirror-bounces at centos.org
>> [mailto:centos-mirror-bounces at centos.org] On Behalf Of J.H.
>> Sent: Wednesday, April 06, 2011 1:37 PM
>> To: Mailing list for CentOS mirrors.
>> Subject: Re: [CentOS-mirror] 5.6 is coming closer
>> 
>> On 04/05/2011 01:52 PM, Karanbir Singh wrote:
>>> On 04/05/2011 12:30 PM, Roelf Wichertjes wrote:
>>>> 
>>>> Maybe a idea,
>>>> Why not choose the least busy ones,
>>>> Say there are 100 mirrors, 5 are busy and 5 almost unused
>>>> Isn't it a better idea to let the 5 busy and the 5 unbusy pull from
>> centos.org
>>>> And have the other 90 pull from the 5 unbusy?
>>>> That should even the load better.
>>>>> On 04/05/2011 10:20 AM, Prof. P. Sriram wrote:
>>>>>> Maybe it's been discussed before, but would it not be worthwhile to
>> do a
>>>>>> DNS based thing for this? We create a temporary rsync source domain
>>>>> 
>>>>> Thats quite a lot of work, I'm more keen on having ACL's in place
>> that
>>>>> only allow some specific mirrors ( maybe the 100 busiest ones ) to
>> pull
>>>>> from centos.org; and have everyone else pull from them.
>>> 
>>> 
>>> from 'busy' -i meant more like kernel.org / heanet.ie or
>> mirrorservice.org
>>> 
>>> - KB
>> 
>> Tiering the mirror distribution is pretty common, and honestly makes
>> things a *LOT* easier for everyone.  I agree with the sentiments already
>> stated, automation is what makes this all doable.  Removing things like
>> --delete from your mirrors, is just a PITA.  Yes accidental upstream
>> removals will happen, but if the mirror infrastructure is structured
>> well it will propagate out and the fix will propagate out quickly.
>> 
>> The way I've normally seen it is a small number (say 10) mirrors are
>> allowed to pull form the master machines, and servers are then
>> encouraged / forced to pull from those tier 1 mirrors.  This means the
>> tier 1's can pull more often from the upstream, and everyone else can
>> make better use of the 1 & 10 gbps (and associated big hardware) links
>> some of the bigger mirrors have.  Personally I think it's worthwhile,
>> and it's not too hard to implement.
>> 
>> Keep in mind that the 'busier' servers (kernel.org at least) are in a
>> better position (hardware / bandwidth) to support a greater number of
>> people pulling from them.  I would guess many of those "unused" mirrors
>> may not be able to support the deluge you could potentially be pointing
>> at them, this isn't universal but it's something to be aware of.
>> 
>> - John 'Warthog9' Hawley
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