Memcached replace Command

Syntax:

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

replace 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 )

Example

In the following example, we set:

• Key → mykey

• Flag → 0

• Exptime → 900 (in seconds)

• Bytes → 10 (bytes of data storage)

• Value → data_value

In the following example, we use the key ‘mykey’’ and store the corresponding value data_value . After execution, we replace the same key The value of is’ some_other_value’

add mykey 0 900 10
data_value
STORED
get mykey
VALUE mykey 0 10
data_value
END
replace mykey 0 900 16
some_other_value
get mykey
VALUE mykey 0 16
some_other_value
END

Output

If the data is added successfully, the output:

STORED

Output information description:

• STORED Output after being saved successfully

• NOT_STORED Output after failed to perform replacement