The memcached cache is a very simple massive key/value storage system, and as such there is no
way of compartmentalizing data automatically into different sections. For example, if you are storing
information by the unique ID returned from a MySQL database, then storing the data from two different
tables could run into issues because the same ID might be valid in both tables.
Some interfaces provide an automated mechanism for creating namespaces when storing information
into the cache. In practice, these namespaces are merely a prefix before a given ID that is applied
every time a value is stored or retrieve from the cache.
You can implement the same basic principle by using keys that describe the object and the unique
identifier within the key that you supply when the object is stored. For example, when storing user data,
prefix the ID of the user with user: or user-.
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