• redis
• redis/distributed
• connection_pool
• active_support/core_ext/array/wrap
• active_support/core_ext/hash/slice
• active_support/core_ext/numeric/time
• active_support/digest

• 模組 ActiveSupport
• 模組 ActiveSupport::Cache
• 模組 ActiveSupport::Cache::Strategy
• 類別 ActiveSupport::Cache::RedisCacheStore