*
* - ObjectCache::getMainWANInstance()
* Purpose: Memory cache.
- * Stored in the local data-center's main cache (uses different cache keys).
- * Delete events are broadcasted to other DCs. See WANObjectCache for details.
+ * Stored in the local data-center's main cache (keyspace different from local-cluster cache).
+ * Delete events are broadcasted to other DCs main cache. See WANObjectCache for details.
*
* - ObjectCache::getLocalServerInstance( $fallbackType )
* Purpose: Memory cache for very hot keys.
- * Stored only on the individual web server (often EmptyBagOStuff in CLI mode).
+ * Stored only on the individual web server (typically APC for web requests,
+ * and EmptyBagOStuff in CLI mode).
* Not replicated to the other servers.
*
* - ObjectCache::getLocalClusterInstance()
* Purpose: Ephemeral global storage.
* Stored centrally within the primary data-center.
* Changes are applied there first and replicated to other DCs (best-effort).
- * To retrieve the latest value (e.g. not from a slave), use BagOStuff:READ_LATEST.
+ * To retrieve the latest value (e.g. not from a slave), use BagOStuff::READ_LATEST.
* This store may be subject to LRU style evictions.
*
* - ObjectCache::getInstance( $cacheType )