storing objects in multiple caches

[scanzano]

Hi All,

I have multiple caches in play. Is it possible (or recommended) to store references in one object to another object that is in another cache? Is this acceptable design?

Consider...

Objects from a db table A are stored in cache A and objects from db table B are stored in cache B. Object A maintains a list of B objects what are related to it in a many-to-many fashion. Do I store the object (B) reference in both A and in cache B or should I duplicate object B?

Thanks
E

[manik]

why would you want to do this? Different cache cfgs? How do your cache cfgs vary?

With such references, eviction will become a problem since even if an object is evicted from a cache it won't be gc'd unless all referencing objects are also evicted from the other cache.

And as for cache loading, object references will break once they are persisted.