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)
Thank you for cc to jawiki-l. I've translated in Japanese and noticed for our community.
On Tue, 26 Sep 2006 15:38:32 -0700 In article 4519ABE8.1030906@pobox.com [[Wikipedia-l] Korean servers to be shuffled: ja, ko, ms, th Wikipedias moving] Brion Vibber brion@pobox.com wrote:
- 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.
great :)
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@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) _______________________________________________ Wikipedia-l mailing list Wikipedia-l@Wikimedia.org http://mail.wikipedia.org/mailman/listinfo/wikipedia-l
Brion Vibber 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.
We'll start at about 18:00 UTC Friday evening (1am Thailand, 2am Malaysia, 3am Japan and Korea). It will take a few hours to dump the databases, copy them, and re-import them, but if everything goes smoothly we hope to have these wikis back to read-write sometime late Saturday morning local time.
There will also be a brief read-only period for most of our other wikis when we switch database servers during the import. That should last only a few minutes, and will not affect en.wikipedia.org (which is on a different database server). It should be some time in late evening or night European time.
-- brion vibber (brion @ pobox.com)
Brion Vibber wrote:
Brion Vibber 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.
We'll start at about 18:00 UTC Friday evening (1am Thailand, 2am Malaysia, 3am Japan and Korea). It will take a few hours to dump the databases, copy them, and re-import them, but if everything goes smoothly we hope to have these wikis back to read-write sometime late Saturday morning local time.
There will also be a brief read-only period for most of our other wikis when we switch database servers during the import. That should last only a few minutes, and will not affect en.wikipedia.org (which is on a different database server). It should be some time in late evening or night European time.
The move is complete. With a better suggestion from Tim Starling, we were able to reduce the read-only time to a few minutes for the general issues and about an hour on the wikis actually being moved.
Please let us know about any unresolved problems or issues, of course.
-- brion vibber (brion @ pobox.com)
wikipedia-l@lists.wikimedia.org