zarb-ml/mageia-sysadm/2011-May/003449.html


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   <H1>[Mageia-sysadm] Tier1 Mirrors</H1>
    <B>Carlos Carvalho</B> 
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       TITLE="[Mageia-sysadm] Tier1 Mirrors">carlos at fisica.ufpr.br
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    <I>Mon May  9 17:27:02 CEST 2011</I>
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<PRE>nicolas vigier (<A HREF="https://www.mageia.org/mailman/listinfo/mageia-sysadm">boklm at mars-attacks.org</A>) wrote on 9 May 2011 17:05:
 &gt;On Mon, 09 May 2011, Carlos Carvalho wrote:
 &gt;&gt; I think a tier1 mirror should indeed meet some requirements:
 &gt;&gt; - minimum bandwidth
 &gt;&gt; - mirror all of the repository, to allow other mirrors update from
 &gt;&gt;   them
 &gt;&gt; - update frequency
 &gt;
 &gt;Good idea.
 &gt;
 &gt;For tier1 :
 &gt;- minimum BW: 1Gb/s ?

Fine.

 &gt;- update frequency: 15mn ?

That's very frequent. I think it's not necessary, and it'll produce a
high load on the master due to the disk scans. For short update
periods the amount of changes/download is small and the disk scans are
the biggest load. For now it won't be a problem because the repository
is still small but later it'll be a bottleneck. Note that it also
causes a load on the mirrors because there's a disk scan there too. I
suggest 2h.

That said, we have no problem with whatever frequency you choose.

 &gt;&gt; About the update frequency, you might want to provide triggering for
 &gt;&gt; the tier1s. It makes updates much more efficient. Some distros use it
 &gt;&gt; and for Debian it's a requirement for a tier1.
 &gt;
 &gt;Interesting. The &quot;Push Mirroring&quot; ?
 &gt;<A HREF="http://www.debian.org/mirror/push_mirroring">http://www.debian.org/mirror/push_mirroring</A>

Yes.
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