The following database servers are in eqiad D1:
- All together receive, 75% of the configured read enwiki traffic, and are the only "high end servers", with 160GB of ram. Also, they are the only API servers. Pplease note that writes are, in comparison, negligible.
- 100% of configured read s5 traffic (dewiki and datawiki). Please note that writes are, in comparison, negligible.
- Sanitarium host, all writes from all shards go here
- 83% of configured read s4 traffic (commons)
- Primary and secondary go-to systems in case of failure, and the analytics host. They replicate all data from all shards and all misc servers.