Can I iterate the item of the memcached server?

[sishen]

Hello everyone.
Please give me some advice on the below problem, thx.

i hash items in memcached in this format, <hashcode, [item content, used 
time]>.
and TimelimitedExpriationPolicy is applied on these item.  If one item 
is expried, it should be removed from memcached. 
And the policy have some difference with the expiry policy of memcached.

So one way to archive this is iterating the clusted cache and  checking 
the items' status.

But i found that i can't get the data collection from the server 
immediately. I want to know
that whether there is a way can do this?