Tag: memcached

As we see before we have done Set CAS operation to increment counter key value. Here is a operator to increment and decrement values directly.

incr  is the operation

Get CAS is used to track key-values in Memcached. Get CAS provides the value with a token. This token is used to Set CAS operation. Syntax is similar to get.

We store key-values all time but I belive that the time to get these values have came :). Now we will look how to get values by providing keys. The

Check and Set Operation aka CAS is a update for existing key-value. For example we get a key-value counter-123 and we increased it to locally 124. Then we try to

Prepend operation is simple and made on existing key-value. Newly provided value will be added at the beginning of existing value. Syntax is the same as other commands.

prepend the operation key the

Append operation is simple and made on existing key-value. Newly provided value will be added at the end of existing value. Syntax is the same as other commands.

append the

Replace operation will change existing key-value. If the key-value do not exists we will get an response like NOT_STORED. Its syntax is similar to add.

replace is the name of the

To remove stored key-value pairs delete operation is used. Delete is one of the most simple command in Memcached.

delete is the operation key is the key we want to delete

Add operation is similar to the set operation but the difference is that is a key is all ready exists NOT_STORED code is returned. This makes add operation more reliable

Set is most used command in Memcached. Its store data. If the data exists it will be over written. New data is always added at the top of the LRU.