[Wikipedia-l] Korean servers to be shuffled: ja, ko, ms, th Wikipedias moving

[Andrew Lih]

Thanks for the update, Brion. It also seems to make sense for
balancing the dynamic nature of the Asian Wikipedias. For example, the
Bahasa Indonesia is now significantly bigger/busier than
Korean/Malay/Thai, an interesting change from when Yaseo was first set
up.

-Andrew (User:Fuzheado)


On 9/27/06, Brion Vibber <brion at pobox.com> wrote:
> Just a heads-up; we're planning to move the backend hosting for Japanese,
> Korean, Malay, and Thai Wikipedias from our Korean server cluster (yaseo) back
> to the main servers in Florida (pmtpa) later this week.
>
> They were hosted on the Korean servers for about a year as an experiment in
> multi-cluster hosting, but in the end we're going to move them back. There are
> several reasons for this:
>
>
> * More reliable management.
>
> Experience has shown that software updates and other issues are more likely to
> have problems on the second cluster, which receives less attention from sysadmins.
>
> These wikis will no longer be second-class citizens where math or timelines sit
> broken for weeks after a change.
>
>
> * More efficient use of resources.
>
> As traffic increases, the limited number of servers we have in the yaseo cluster
> are less able to handle the load. They now frequently overload during peak
> access hours in Asia, and we can't add new servers as easily as we can in Florida.
>
> Sharing the larger pool of application servers in Florida, and reusing the
> remaining Korean machines for additional proxy caches, should provide better
> performance during peak hours in Asia.
>
>
> * Single-login preparation.
>
> Hosting all the wikis together will let our unified login system work for these
> wikis along with the others when we finally start it up.
>
>
> Expected changes and disruptions:
>
> There will be some read-only time for the wikis being moved later this week
> during the actual transition, but other wikis should not be affected. We will
> try to do this during off-peak hours in Asia.
>
> URLs for uploaded images will change to use upload.wikimedia.org as on other
> wikis; old URLs will redirect for compatibility so this should not disrupt anything.
>
> Performance for the moved wikis should be better overall, though off-peak access
> for logged-in users may be slightly slower due to lightspeed delays between
> Korea and Florida.
>
> -- brion vibber (brion @ pobox.com)
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