backup and restore cache image

[Mimmo DF]

>On 2007-07-06 11:07:11 +0200, Mimmo DF wrote:
>> they are sure that my question has been already discussed but is this:
>> Is it possibile to create a cache's image on disk to quickly restore
>> it when memcached going up after restart? How can I do this?
>
>you cant.
>
>   darix

Why not?
Is not developed or is impossible to include into memcached project?
Or is it a bad policy to manage cache?