RFC: caching in CHKInventory

[Robert Collins]

On Fri, 2008-10-03 at 09:42 +1000, Andrew Bennetts wrote:


> I'm not sure I have enough context to form an opinion.  So instead I'll
> ask some questions.
> 
> So the underlying CHKMaps cache already...  are these shared at all
> between CHKInventories?  

The maps are not shared; they may have pointers in common; caching here
isn't implemented yet, but I intend it to be a layer on top of VF that
caches requested texts, or alternatively a helper that caches parsed
pages.

> Will implementing caching in CHKInventory mean
> there are two layers caching the same data?

Kindof. consider a three-node map: root, leaf1, leaf2, the cache in the
Map level will have the three nodes; maybe parsed, or maybe as bytes.
The CHKInventory cache would have the actual InventoryEntry objects
looked up by the client.

>   What exactly are you
> considering caching, inventory entry objects?

Yes.

-Rob
-- 
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