This is primarily to reduce load on MongoDB, where we've lately
had performance problems that we suspect are caused by very
large course structures being evicted from MongoDB's cache. This
may potentially give us a path to better performance as well,
but that's not the goal of this commit.
Surprisingly, LZ4 seemed to actually run more slowly than zlib
for this. Possibly because of some overhead in the Python
bindings? GZip was also surprisingly slow given that it uses
zlib underneath (something like 5x slower).
Use separate cache backend for caching structures.
Abstract out course structure cache.
add datadog metrics for compressed course structure sizes
Since we're using a different cache background, we don't need to have a cache prefix
Use dummy cache backend for tests.
Fallback to default cache if course_structure_cache doesn't exist.
This allows the holder of a third-party access token (e.g. from Google
or Facebook) to get a first-party access token for the edX account
linked to the given access token.
path.py objects report themselves as class objects, which confuses the heck out of
pylint. It tries to match variable names using the class-rgx regular expression
instead of the constant-rgx regular expression, and it doesn't match, so it
throws an error. Not sure how to fix pylint, so we'll just ignore these errors.
Tests in common are run with both CMS and LMS configuration (with different env files). Ensure the DEFAULT_FILE_STORAGE variables are in both environments.
Including:
* Change path for mongo_metadata_inheritance to use unique temp dir
* Update SASS_CACHE_PATH with thread-safe temp dir
* Remove hard coded directory reference for grades download tests
* Remove hard coded directory reference for direct mongo test
Changed "Status Page" -> "Page".
UX:
support for displaying built-in tabs
restored drag and drop on Studio Pages
additional styling for fixed state on Studio Pages
add a new page action added to bottom of Studio Pages
Dev
changes for viewing tabs in studio,
refactored the tab code,
decoupled the code from django layer.
is_hideable flag on tabs
get_discussion method is needed to continue to support
external_discussion links for now since used by 6.00x course.
override the __eq__ operator to support comparing with
dict-type tabs.
Test
moved test code to common,
added acceptance test for built-in pages
added additional unit tests for tabs.
changed test_split_modulestore test to support serializing objects
that are fields in a Course.
Env:
updated environment configuration settings so they are
consistent for both cms and lms.
