DynamoDB: Add ctk load table interface for processing CDC events
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amotl
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| # TODO: Make configurable. | ||
| create_stream=True, | ||
| iterator_type="TRIM_HORIZON", | ||
| sleep_time_no_records=0.2, |
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Yes. What the comment says.
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iterator_type="TRIM_HORIZON" (currently hard-coded) means it will always read the Stream from its starting point. Sure enough, this is probably the most important detail to be made configurable.
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07b1974 adds a few options to configure details when connecting to the Kinesis Stream.
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| # TODO: Make configurable. | ||
| create_stream=True, | ||
| buffer_time=0.01, |
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07b1974 adds a few options to configure details when connecting to the Kinesis Stream.
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In contrast to the Lambda-based processor implementation, this one is a standalone one that can be used optimally in any Python environment, managed or not.
New options: batch-size, create, create-shards, start, seqno, idle-sleep, buffer-time.
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About
Running DynamoDB CDC events through Kinesis and processing them using an AWS Lambda is cumbersome more often than not, and not too suitable for collaboration and development purposes. This patch provides a standalone implementation, as a sister to the corresponding full-load implementation, DynamoDB Table Loader.
Documentation
Preview: https://cratedb-toolkit--247.org.readthedocs.build/io/dynamodb/cdc.html
Synopsis
Use AWS for real, or exercise using LocalStack.
Install
pip install 'cratedb-toolkit[kinesis] @ git+https://github.com/crate/cratedb-toolkit.git@dynamodb-cdc-standalone'Details
This data nozzle is tapping into Change data capture for DynamoDB Streams, in this case using Kinesis Data Streams, for maximum universality, because using Kinesis isn't a bad idea: We will also use it to ingest other event/record types in the future, thus the protocol identifier
kinesis+dynamodb+cdc://. On the egress side, towards CrateDB, it will use thedata/auxcolumn strategy.It doesn't mean it's not cloud-ready, it is just more universal, because it can be used both in an ad hoc / standalone operations mode, in development sandboxes, and can also be invoked on any other managed Python environment, at your disposal.
Backlog I
create_stream,iterator_type,sleep_time_no_records, etc.Backlog II
See DynamoDB: General backlog #231.
/cc @juanpardo, @hlcianfagna, @hammerhead, @wierdvanderhaar, @karynzv