What's the difference between ensemble and tensorrt_llm_bls?

[Saigut]

Hello, what's the difference between ensemble and tensorrt_llm_bls (models in all_models/inflight_batcher_llm)?
Do they do the same thing using different method?

[Saigut]

Triton's ensemble feature supports many use cases where multiple models are composed into a pipeline (or more generally a DAG, directed acyclic graph). However, there are many other use cases that are not supported because as part of the model pipeline they require loops, conditionals (if-then-else), data-dependent control-flow and other custom logic to be intermixed with model execution. We call this combination of custom logic and model executions Business Logic Scripting (BLS).

From: https://github.com/triton-inference-server/python_backend/blob/main/README.md#business-logic-scripting