[CentOS-mirror] AltArch mirror geographical coverage, need more mirrors outside US/EU

Tue Oct 9 05:42:46 UTC 2018
Theo Morra <theo at morra.nz>

Sync is now done. I serve both HTTP and HTTPS as well as RSYNC.


> On 9/10/2018, at 5:45 PM, Theo Morra <theo at morra.nz> wrote:
> Hey there. Second AltArch mirror in APAC.
> https://altarch.mirrors.theom.nz/centos/ <https://altarch.mirrors.theom.nz/centos/>
> rsync://rsync.mirrors.theom.nz/centos-alt/ <rsync://rsync.mirrors.theom.nz/centos-alt/>
> Sync is being performed now. Should be done in about an hour
> As usual, my mirror is in both Auckland and Christchurch in NZ.
> Theo
>> On 9/10/2018, at 10:19 AM, Anssi Johansson <avij at centosproject.org <mailto:avij at centosproject.org>> wrote:
>> Hi, we're looking to extend the geographical coverage of CentOS AltArch
>> mirrors a bit. For those who don't know, the Alternative Architecture
>> SIG produces CentOS 7 for all kinds of odd architectures such as
>> aarch64, armhfp, i386, power9, ppc64 and ppc64le.
>> We have a separate list of mirrors providing AltArch content at
>> https://www.centos.org/download/altarch-mirrors/ <https://www.centos.org/download/altarch-mirrors/> and if you have a look
>> at that list, you will notice that there are several mirrors from Europe
>> and U.S., but less from other regions.
>> We're currently in the process of shifting AltArch-related traffic from
>> mirror.centos.org <http://mirror.centos.org/> to external mirrors. Most of those mirror.centos.org <http://mirror.centos.org/>
>> nodes double as msync nodes, and by directing users to use external
>> mirrors instead of mirror.c.o, more bandwidth would be available for
>> syncing external mirrors. In addition to the saved bandwidth, many of
>> the external mirrors have much more bandwidth than msync.c.o nodes, so
>> the end users will also see a benefit.
>> If the existing AltArch mirrors have a look at their traffic stats, they
>> will probably notice that there hasn't been much AltArch traffic. That
>> will see a slight increase soon, though. We will soon push out updated
>> centos-release packages for AltArch that will use mirrorlist.c.o to find
>> a nearby external mirror, instead of the currently configured
>> mirror.centos.org <http://mirror.centos.org/>. The old mirror crawler only checked main architecture
>> repos (and only a subset of those), but the current mirror crawler will
>> check main architectures and AltArch architectures, and all the
>> repositories that are active.
>> Some AltArch .iso download links have also been changed to point to
>> isoredirect.c.o, which has a newly added capacity to redirect AltArch
>> .iso image requests to external mirrors. The remaining AltArch .iso
>> redirects to external mirrors will be done prior to CentOS 7.6.18xx release.
>> That said, I don't expect AltArch to generate significant additional
>> traffic compared to the main architectures. My primary concern here is
>> the geographical coverage, ie. the number of countries represented.
>> Let's say that it'd be nice if there were mirrors from a handful of
>> countries from each continent.
>> If there isn't yet an AltArch mirror in your country and you think your
>> mirror could close a "gap", please consider mirroring AltArch as well.
>> At the moment AltArch consumes around 100 GB of disk space. Please note
>> that when CentOS 7.6.18xx gets released, both 7.5.1804 and 7.6.18xx will
>> be kept on mirrors for a while, thus temporarily doubling the disk space
>> required.
>> Another technical point is that if you start mirroring AltArch, the
>> content must be available in a different directory (and thus at a
>> different URL) than the main content. One common convention is to have
>> directories "centos" and "centos-altarch". You will also need to invoke
>> rsync twice; first for the main content (as before) and then for the
>> AltArch content at rsync://msync.centos.org/altarch/ <rsync://msync.centos.org/altarch/>
>> Although all current CentOS mirrors can already access the above
>> msync.c.o module for AltArch, it would be nice if you could do your
>> initial rsync from some other external mirrors listed on
>> https://www.centos.org/download/altarch-mirrors/ <https://www.centos.org/download/altarch-mirrors/> , even if the nearest
>> external mirror providing AltArch over rsync isn't exactly nearby. Once
>> you have done an initial sync from an external mirror, you can switch to
>> doing incremental syncs from rsync://msync.centos.org/altarch/ <rsync://msync.centos.org/altarch/>
>> Once you are done, please provide the http/https/rsync URLs to your
>> mirrored AltArch content so those could be added to the list.
>> Thanks for reading this far, and thanks for all the bandwidth!
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