User:Southparkfan/SiteUpdate

Orain Site Update #3
This is the Site Update for September, October, November and December 2014.


 * Technical Changes
 * All Orain wikis are now running on the [//hhvm.com/ HipHop Virtual Machine] (also known as HHVM) environment . This is an environment almost the same as PHP, but it's faster with processing PHP scripts.
 * All Orain servers are now running Ubuntu Trusty (14.04), to work with HHVM.
 * prod3 and prod4 have been removed from the cluster, see the "Technical Issues" part for more information.
 * prod8, prod9 and prod11 have been added to the cluster. They serve MediaWiki, images and XML dumps.
 * prod10 has been added to the cluster, in the beginning it was a CirrusSearch server for All The Tropes Wiki, but has been recycled as a HAProxy server, which load balances the traffic among the 3 MediaWiki servers.
 * Orain is now hosting its own DNS. Before Orain used to host its DNS at CloudFlare. Anyone wanting to view or edit Orain's DNS records, can take a look [//github.com/Orain/dns here].


 * Technical Issues
 * prod4 has been removed from the cluster due to repeated OS (operating system) failures and after several installs. prod4 has been replaced by prod9.
 * For a while (but mainly in December), HHVM wasn't fulfilling requests which caused slow wikis and 504 errors. A load balancer has been implemented (which spreads all requests among the MediaWiki servers), and some extra MediaWiki servers were added, to solve this. See also the incident logs on techwiki.
 * Orain experienced 2 hours of downtime, because a change to use another MariaDB version led into a MariaDB crash on prod3. All data (pages, user information, page text, etc.) was successfully transferred to a new server, prod12. prod3 has been permanently removed from the cluster. See also the incident logs on techwiki.

On behalf of the Orain staff, [timestamp]

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