cache API alternatives
One drawback of using KV for the cache is that there is no easy way to purge that cache. With the current approach by using Cache API we put a custom Cache-Tag to a response, let's say category name. And then once we update pages in that category we call CF API to purge cache by that cache tag. There might be a million pages in that category, so we just purge by cache tag and no need to purge cache for each page.
Maybe I didn't completely get the idea of the approach used in worker sites (https://blog.cloudflare.com/extending-the-workers-platform/) but looks like it doesn't fit our use case as we can't update millions of pages in KV.
I thought maybe we can have different KV namespaces per each category, so when we need to purge the cache - recreate the namespace. There is a limit of 100 namespaces and we might have thousands of categories.
With R2 there is the same cache purge issue + it doesn't support keys expiration as we have in KV
Maybe I didn't completely get the idea of the approach used in worker sites (https://blog.cloudflare.com/extending-the-workers-platform/) but looks like it doesn't fit our use case as we can't update millions of pages in KV.
I thought maybe we can have different KV namespaces per each category, so when we need to purge the cache - recreate the namespace. There is a limit of 100 namespaces and we might have thousands of categories.
With R2 there is the same cache purge issue + it doesn't support keys expiration as we have in KV
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