Is memcache append () internally atomic?

Question

Basically, if two processes try to add the same key at the same time, is it likely that it will ever overwrite the other?

eg:.

Process 1 adds "a" to key "k"

Process 2 adds "b" to key "k"

Do we guarantee the presence of two characters (either "ab" or "ba") as a value after performing these steps?

Answer 1

Yes, memcached does not read / write to add, so concurrency is provided