Redis adapter stores whole policy as single string, not scalable

Hey there,
I am working on Node Casbin with a Redis Adapter. After looking at both the adapters mentioned in the doc, I realised that the whole policy JSON is being stored as a single string which will not work at large scale where we have a huge number of policies.

Has anyone explored any other way of managing policies in Redis at scale? Happy to hear any ideas around the same as well.

use other SQL adapters

We have been using SQL adapters but the high latency from RDS being under load is impacting our overall AuthZ performance, which is why we are looking to switch to Redis adapters.