class ActiveSupport::Cache::RedisCacheStore

def write_entry(key, entry, raw: false, **options)

Requires Redis 2.6.12+ for extended SET options.

Write an entry to the cache. 
def write_entry(key, entry, raw: false, **options)
  write_serialized_entry(key, serialize_entry(entry, raw: raw, **options), raw: raw, **options)
end