The current baseline is modeled support the following shared scans:

• Object for the latest DR only
• Object_extra for the latest and latest-1 DRs
• Source for the latest DR only
• ForcedSource for the latest DR only

Note that with the exception of Object_extra, we are planning to support efficient full-table-type access to the latest data release only. Short non-scan queries will be supported for any data release available on disk (per baseline, that'd be latest and latest -1).

I'm soliciting comments and reactions. Changing the model and providing access to older data release is not a technical problem, it is only a question of $ (how much hardware to purchase).