"Marc A. Pelletier" <[email protected]> wrote: > [...]
> The database replication is also well on its way; you can find the > current roadmap at: > https://wikitech.wikimedia.org/wiki/Tool_Labs/Database_plan > [...] To quote from there: | Overview | * All public wikis will be replicated to the LabsDB servers, | with private user data redacted. | * First, data will be replicated to a special set of data- | base servers (PreLabsDBDBS) that use triggers to rewrite | or remove private data. They will write row based bin- | logs. Production shards will map 1:1 with mysql in- | stances, unlike on toolserver where some are combined via | a custom replication engine. | * Triggers will be created with the help of the redactatron | schema review tool. | * The actual labs databases will replicate from the above | mentioned databases. Users will access data via views | that only include reviewed tables and columns to ensure | that unreviewed tables (such as from a new extension) | aren't exposed without prior review. | * Replicated data will be stored on flash storage, while | each system will have a traditional disk array attached to | store labs project data. Users will be able to join | project tables against wiki tables, but only within the | current shard. | * The labs team will integrate these databases with labs, | automating database creation and access on a per-project | basis. This means that JOINs for example between wikis and Commons or Wikidata will not be possible. WTF? One of the stated goals of Tool Labs is "Provide a location for analytics work", so any changes here should /enhance/ the possibili- ties the Toolserver offers and not shrink them. This is BTW one of the top items on the "Needed Toolserver features" list. I'm all for the "lazy sysadmin" paradigm, but I think that shouldn't preclude usable databases. River's trainwreck is freely available (https://svn.wikimedia.org/svnroot/mediawiki/trunk/tools/trainwreck) and open source, and the effort to port it to Ubuntu and set it up is a valuable investment (or the setup of any other replication engine that provides the *needed* functionality; many-to-one/many isn't something only Tool Labs requires). Tim _______________________________________________ Labs-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/labs-l
