Outline
Hash object can be ziplist or Hashtable (ht)
ht say, ziplist how to save key-value pairs, the object is to put the key into the tail, then the value of the object into the tail, so that the two brothers will always be next. And always at the latest at the end of the team added.
ziplist conditions: the
string length of all keys and key values are less than 64 bytes of
key 512 is less than the number of
conditions of the hashtable:
None of the above satisfied
The above two values of the parameters may be changed by
the hash-value-max-ziplist
the hash-max-entries It-ziplist
Some commands
| command | effect |
|---|---|
| HSET | Save key for |
| hget | Gets the value according to the key |
| HEXISTS | The key value pairs is determined whether there |
| HDEL | According to key delete nodes |
| SELECT | The number of keys |
| HGETALL | Get all key-value pairs |