Redis as memory store in langgraph checkpoint

[pranjaldoshi96]

I have seen document which has steps to support redis as memorysaver in langgraph documentation: https://langchain-ai.github.io/langgraph/how-tos/persistence_redis/#setup-environment

We already have similar support for in memory support in langgraph. Shouldn't we have a implementation for redis as well in langgraph so it will be easier to use similar to in-memory store.

[vbarda]

@pranjaldoshi96 we don't plan to provide built-in support for any checkpointers other than in-memory in the library itself. we also provide sqlite and postgres implementations as installable libraries, see more information on this in the release notes here https://github.com/langchain-ai/langgraph/releases/tag/0.2.0

we don't currently have plans for an official Redis checkpointer library but will post here if that changes

[pranjaldoshi96]

Got it. From the documentation the packages name are like
langgraph_checkpoint_sqlite or langgraph_checkpoint_postgres is it the case the checkpoint will be added when the provider like redis itself takes up for the implementation and maintainer similar to how llm providers are doing?

[vbarda]

yes, we will mostly be working with our partners (providers) to implement and maintain these checkpointer packages. in the meantime you can just use/modify the reference implementation

[pranjaldoshi96]

Thanks for the help

[ltoniazzi]

@vbarda Thanks, just to clarify, the sqlite implementation as installable library only provides the checkpointer but not the store (for graph_builder.compile), correct?

[vbarda]

yea not at the moment, but you can use DuckDB checkpointer that has both!

[luisramirez7]

Is it possible to mix and match the checkpointer / store backends? we are using a Redis checkpointer, so we're missing out on the store utility. Happy to use what has support atm.