Interest in DynamoDB Checkpointer?

[dzubke]

Is there any interest in a DynamoDB checkpoint saver contribution? I see a DynamoDB Chat Message History, which is in the langchain community. I know there isn't a community library for langgraph, and I see the postgres and sqllite checkpointers split as separate packages.

DyanmoDB is much more specific and won't be used as often as postgres or sqllite, so I just wanted to ask if that contribution would be interesting to the community. And if so, where would be the best place for me to contribute that code?

Thanks!

[dzubke]

@vbarda, @pelguetat - I see you tagged or responded to the discussion on a firestore chekpointer. There may then be some interest in a DynamoDB checkpointer. Perhaps, I should just create the PR, but I wanted some assurance that it wouldn't be rejected if I created the PR. I have much of it written already, but there is still some effort in putting it together.

[vbarda]

@dzubke for now we're planning to only have official packages that are maintained by LangChain and and our partner providers. since you're interested in creating a library, i would recommend that you create/maintain it in your own repo. would be happy to answer questions / help if you run into any issues! thank you for your interest in contributing!

[dzubke]

@vbarda - thank you for the update! I will let you know if I end up creating a library in my own repo.

[guilhermebene]

@dzubke Have tou had any progress with this implementation? I am interested in contributing if possible.

[wpoynter]

Unless work has already begun on this, I think I will start a package v.soon as we are locked into AWS and leaning heavily on serverless.

[ClaudioRocca24]

@dzubke I am currently working on a DynamoDB checkpointer myself, I have done most of the work but I still have some issue. Perhaps it would be nice to share our works to come up with a working solution?

[rog555]

This could help

https://github.com/rog555/abnosql

[glezma]

Check this out https://github.com/glezma/langgraph-checkpoint-dynamodb

[AlcebiadesFilho]

why in js is available? i donw understand =(

[aaronsu11]

Hi folks, I'm an AWS solution architect and I’m happy to share a package that I’ve built for this.

PyPI page: https://pypi.org/project/langgraph-checkpoint-amazon-dynamodb/

It's a single-table DynamoDB implementation of the LangGraph checkpoint saver interface with the following key features:
• Both sync and async support
• Flexible infrastructure setup
• Optional encryption, TTL and point-in-time recovery

Get started
pip install langgraph-checkpoint-amazon-dynamodb

Need CDK stack?
pip install "langgraph-checkpoint-amazon-dynamodb[infra]"

Please feel free to check it out and share any feedback: https://github.com/aaronsu11/langgraph-checkpoint-dynamodb

[arielbeckjit]

Hi @aaronsu11 i've tried it - there's a big issue where each message from user to AI - it creates TONS of items in dynamodb, which will cause costs to soar

What i want - is just to save messages (AI / human) - without all the rest - so i can add it later to the conversation history - this might be not a good approach using checkpointer?

[aaronsu11]

Hey @arielbeckjit, thanks for the comment.

If you just want to save messages without all the functionality of checkpoint in the context of a graph, I would recommend just using the langchain message histories component such as this module: https://python.langchain.com/docs/integrations/memory/aws_dynamodb/

If you still want to use checkpoint with frequent updates to state (like persistent & high frequency conversation), you can use the time-to-live (TTL) feature or create your custom clean up schedule such as deleting all checkpoints and writes except the latest at a given interval.

[arkodeep3404]

hello guys
i want to use dynamo db for storing conversation message history for my real time ai chatbot
has anybody developed a package that is suitable for production uses??
please lmk
thanks