What's the maximum limit of keys / storage size of pika?

[sprappcom]

possible to provide the limits for keys and storage size per pika instance?
e.g. 1000billion keys, 100 exabytes.

does anyone have an answer to this? i understand the underlying storage is in rocksdb but i'm not sure if there are special code used for stretching the limits etc.

rationale for this question:
hope to use juicefs redis meta engine on pika so was wondering if anyone has any such experience on usage for high data "ingestion" etc. hiccups to note for etc. etc.