We're planning on doing another master split this weekend. The idea is to split off the following databases onto their own master:
bgwiki bgwiktionary commonswiki cswiki dewiki enwikiquote enwiktionary eowiki fiwiki idwiki itwiki nlwiki nowiki plwiki ptwiki svwiki thwiki trwiki zhwiki
This is a hand-selected list designed to simultaneously balance both the data set size and the request rate across the two non-en partitions. Some of the data used can be found at:
https://wikitech.leuksman.com/view/Index_size_versus_traffic
There should be no significant disruption to the main web service. Some subsidiary services, such as toolserver replication, may be affected.
-- Tim Starling