🔧(cache) configure Django cache

Default configuration was using LocMemCache backend preventing cache to be shared between containers. By example, lms course plan was not invalidated when modifications were made in studio. We now use Memcached as default cache and LocMemcach for 'location mapping' as recommended by edX https://github.com/edx/edx-platform/blob/master/lms/envs/aws.py#L199
openfun · Dec 18, 2018 · 4477acf · 4477acf
1 parent dcc9dac
commit 4477acf
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Showing 2 changed files with 12 additions and 12 deletions.
diff --git a/config/cms/docker_run_production.py b/config/cms/docker_run_production.py
@@ -146,9 +146,13 @@
 CACHES = config(
     "CACHES",
     default={
-        "default": {
+        "loc_cache": {
             "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
-            "LOCATION": "unique-snowflake",
+            "LOCATION": "edx_location_mem_cache",
+        },
+        "default": {
+            "BACKEND": "django.core.cache.backends.memcached.MemcachedCache",
+            "LOCATION": "memcached:11211",
         }
     },
     formatter=json.loads,

diff --git a/config/lms/docker_run_production.py b/config/lms/docker_run_production.py
@@ -225,22 +225,18 @@
 CACHES = config(
     "CACHES",
     default={
-        "default": {
+        "loc_cache": {
             "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
-            "LOCATION": "unique-snowflake",
+            "LOCATION": "edx_location_mem_cache",
+        },
+        "default": {
+            "BACKEND": "django.core.cache.backends.memcached.MemcachedCache",
+            "LOCATION": "memcached:11211",
         }
     },
     formatter=json.loads,
 )
 
-# Cache used for location mapping -- called many times with the same key/value
-# in a given request.
-if "loc_cache" not in CACHES:
-    CACHES["loc_cache"] = {
-        "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
-        "LOCATION": "edx_location_mem_cache",
-    }
-
 # Email overrides
 DEFAULT_FROM_EMAIL = config("DEFAULT_FROM_EMAIL", default=DEFAULT_FROM_EMAIL)
 DEFAULT_FEEDBACK_EMAIL = config(