Blobcache consists of a series of in-memory caches that store content addressed binary blobs across nodes. The metadata server encodes the location and some other information specific objects.
blobcache:entry: --> { "hash": , "size:": uint64, "source": s3://oci-images-stage/myfile.bin,0-1000 "content": []bytes OR nil }
blobcache:location: --> SET {blobcache-host-9f5739.tailc480d.ts.net, blobcache-host-22222.tailc480d.ts.net}
blobcache:ref:hash --> INT (inc/dec) ref on SET/EVICT
on insert: - pick a shard (maybe the closest), and store the content - when done, we will add a ref to that particular shard - we will also INC the ref count
on evict: - convert key to hash - decrement ref - srem location - evict all other chunks
on retrieve: - TODO