Memcached - Set Data

Memcached set command is used to set a new value to a new or existing key.


The basic syntax of Memcached set command is as shown below −

set key flags exptime bytes [noreply] 

The keywords in the syntax are as described below −

  • key − It is the name of the key by which data is stored and retrieved from Memcached.

  • flags − It is the 32-bit unsigned integer that the server stores with the data provided by the user, and returns along with the data when the item is retrieved.

  • exptime − It is the expiration time in seconds. 0 means no delay. If exptime is more than 30 days, Memcached uses it as UNIX timestamp for expiration.

  • bytes − It is the number of bytes in the data block that needs to be stored. This is the length of the data that needs to be stored in Memcached.

  • noreply (optional) - It is a parameter that informs the server not to send any reply.

  • value − It is the data that needs to be stored. The data needs to be passed on the new line after executing the command with the above options.


The output of the command is as shown below −

  • STORED indicates success.

  • ERROR indicates incorrect syntax or error while saving data.


In the following example, we use tutorialspoint as the key and set value Memcached in it with an expiration time of 900 seconds.

set tutorialspoint 0 900 9
get tutorialspoint
VALUE tutorialspoint 0 9

Set Data Using Java Application

To set a key in Memcached server, you need to use Memcached set method.


import net.spy.memcached.MemcachedClient;
public class MemcachedJava {
   public static void main(String[] args) {
      // Connecting to Memcached server on localhost
      MemcachedClient mcc = new MemcachedClient(new
      InetSocketAddress("", 11211));
      System.out.println("Connection to server sucessfully");
      System.out.println("set status:"+mcc.set("tutorialspoint", 900, "memcached").done);
      // Get value from cache
      System.out.println("Get from Cache:"+mcc.get("tutorialspoint"));


On compiling and executing the program, you get to see the following output −

Connection to server successfully
set status:true
Get from Cache:memcached
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