edx/edx-submissions — pull request #8 by wedaly (2014-08-01 12:38:43+00:00)
Title: Use read replica and cache for top scores

The leaderboard feature should be able to tolerate some latency in the search results. This PR changes the `get_top_submissions()` API call to use a cache and the read-replica by default. The change is backwards-compatible and will require no modifications to the leaderboard PR in edx-ora2.

@stephensanchez please review.