Read Chunk Cache

Is there a good way to get a chunked read cache? vfs-cache-mode-full slows things down because it has to download the entire file and isn't flexible as having a chunk cache like the actual cache backend. I've also read that the cache backend has slower access times than vfs. It would be ideal to have a read cache that would transparently cache chunks so that the client could be served data directly if the chunk is not currently cached, instead of making the client wait until the chunk is written to disk and then delivering the data to the client via a disk read. Also, it would be ideal for the cache to have a least recently used chunk replacement algorithm.

Sounds like you want the cache backend:

Chunks are delivered from memory or read from disk if it isn't sequential.

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