Returns the whole hash, as an array of strings indexed by strings.
name - The name of the hashmapKey-Value list.
The key-value list is return as: k1 v1 k2 v2 ...
ssdb 127.0.0.1:8888> hset h k v
ok
(0.000 sec)
ssdb 127.0.0.1:8888> hset h k v2
ok
(0.000 sec)
ssdb 127.0.0.1:8888> hgetall h
key             value
-------------------------
  k               : v2
1 result(s) (0.000 sec)
ssdb 127.0.0.1:8888>