PERSIST
Syntax
        PERSIST key
- Available since:
- 2.2.0
- Time complexity:
- O(1)
- ACL categories:
- 
              
                @keyspace,@write,@fast,
Remove the existing timeout on key, turning the key from volatile (a key
with an expire set) to persistent (a key that will never expire as no timeout
is associated).
Return
Integer reply, specifically:
- 1if the timeout was removed.
- 0if- keydoes not exist or does not have an associated timeout.