What is the flags arg in Finagle Memcached set method

Question

com.twitter.finagle.memcached.Client defined the set method as

set(key: String, flags: Int, expiry: Time, value: T): Future[Unit]

What should the flags be? Is there any documentation available for this?

Answer 1

from: http://docs.libmemcached.org/memcached_set.html

“flags” is a 4byte space that is stored alongside of the main value. Many sub libraries make use of this field, so in most cases users should avoid making use of it.