Posted by Erwin Moller on 03/16/07 08:16

surfivor wrote:

>
> I understand that memcached can store objects on different servers
> using hashing, and I've seen typical things such as storing query
> results.
>
> Say at line 100 in module 'A', I want to render some content so I
> check the memcache. If previously I had rendered this from this same
> line of code and it's in the cache, then I use that. However, what if
> module B changed one of the records on the database and that was in
> the cache ? It must be up to me to have a scheme worked out that I
> will delete the object from the cache that is referenced from module A
> because I changed the database.

Hi,

Sorry if I sound stupid because I never worked with memcache, BUT isn't this
excactly the kind of thing where you need a database?
A database will handle your concurrency, possible changed tuples, etc just
fine.

You can even store the results of a query in the database if you want, and
just update that when needed (= when the underlying data changes).

Regards,
Erwin Moller

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