1.5. Memcached set command

发布时间 : 2025-10-25 13:33:43 UTC      

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Memcached set command is used to use the value (data value) is stored in the specified key .

If set of key already exists, this command can update the key ,the corresponding original data, that is, to achieve the role of update.

1.5.1. Syntax:

The set basic syntax format of the command is as follows:

set key flags exptime bytes [noreply] value 

The parameters are described as follows:

  • key :Key value key-value in the structure key used to find cached values

  • flags :Can include integer parameters for key-value pairs, which clients use to store additional information about key-value pairs

  • exptime :Length of time to save key-value pairs in the cache (in seconds,0 means forever)

  • bytes :Number of bytes stored in the cache

  • noreply (optional): this parameter tells the server that there is no need to return data

  • value :The stored value (always in the second line) (which can be directly understood as key-value in the structure value )

1.5.2. Example

In the following example, we set:

  • Key → runoob

  • Flag → 0

  • Exptime → 900 (in seconds)

  • Bytes → 9 (bytes of data storage)

  • Value → memcached

set runoob 0 900 9 memcached STORED get runoob VALUE runoob 0 9 memcached END 

1.5.3. Output

If the data setting is successful, the output:

STORED 

Output information description:

  • STORED :Output after being saved successfully

  • ERROR :Output after a failed save

《地理信息系统原理、技术与方法》  97

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